A list of characters from the anime and manga series ''Manga/ArakawaUnderTheBridge'', a series about an eccentric group of homeless people that have formed a community under a bridge on the Arakawa River.


!!Kou Ichinomiya a.k.a. Recruit

->'''Played by''': Creator/HiroshiKamiya (voice, anime), and Kento Hayashi (drama)

The main character. Rec is a straight-laced young man who is good at everything he tries, but also follows his family's mantra, "Never put yourself in debt to anyone" to the letter. Unfortunately, this is what lands him in the strange community of Arakawa's riverbank. He's a teacher in the river village.

* TheAce: He is good at everything, but that also works against his favor in some ways. It is the result of his father's teachings under their family's mantra.
* BerserkButton: He doesn't like being called "Leech", especially once it started to catch out with the rest of the riverbank's villagers. The first time, [[RantInducingSlight he didn't take it well]].
* {{Bishonen}}: Takes it UpToEleven after completing Jacqueline's weight loss program.
* {{Bookworm}}: He started reading technical books when he was a ''baby''. He is by far one of the smartest members of the Arakawa's community.
* {{Brainwashed}}: In Episode 8 of Season 2, he was {{charm|Person}}ed by Amazoness's Tengu Brothers to [[DevotedToYou fall for her]].
* ButtMonkey: Since he is the FishOutOfWater from the Arakawa's community, he is the only one who doesn't get their idiosyncrasies. He is also often made fun by them, because his normal-world's logic doesn't work for ''them''.
%%* TheComicallySerious
* DebtDetester: His family's mantra and principle is "Never put yourself in debt to anyone", as a result, he always pays all debts as quickly as possible... except when he finds himself in a quandry when a venusian who lives under a bridge saves his life.
* EmbarrassingNickname: Who on Earth would like to be known as "Recruit" (especially considering his company's job position)?
* FishOutOfWater: Rec is the only member of the Arakawa's village that applies "normal" logic to everything that happens there.
* IOweYouMyLife: He believes that this is what will happen if he becomes indebted to someone. Except ''that'' is exactly what happens when Nino saves him the first time they meet, becoming lovers as a result.
* IconicItem: His red tie that has the Ichinomiya family's mantra embroidered on it.
* KansaiRegionalAccent: For some unknown reason, it pops up when he becomes ''very'' angry.
* LimitedWardrobe: He always uses a pair dressing pants, a shirt and his red tie.
* LoonyFriendsImproveYourPersonality: Little by little, the more he stays with the rest of the Arakawa's community, the better his own personality changes.
* MasculineGirlFeminineBoy: To some extent, he is the Feminine Boy to Nino's Masculine Girl. He is said to have the heart of a maiden, while Nino is more TheStoic, because she doesn't know how human girls are supposed to act.
* NeatFreak: Rec is obsessed with cleaning his own living space.
* NonIdleRich: The Ichinomiyas are practically rich, and he has a high position in their own company. However, since the Mayor doesn't want any of his own money (and Rec doesn't want to be seen as a "leech"), the best he could do is getting a job as a teacher for the younger members of the riverbank's community.
* NotSoDifferent: He sees Hoshi as a petty person, but when they team up, he becomes as petty as him.
* OfficialCouple: With Nino. [[spoiler: They are literally their respective "other halves"]].
* OneHeadTaller: He is much taller than Nino.
* OnlySaneMan: To [[UpToEleven a extreme]], considering the type of place that is the [[{{Cloudcuckooland}} Arakawa's riverbank village]], and at some point he just plays along with them.
* WellDoneSonGuy: This is how Rec sees his relationship with his father. Rec's motivation for doing what he tells him is because he wants him to recognize his own merits, which he often doesn't. (''So much'' that Takai sees himself as his dad's replacement... to a ''creepy'' degree).


->'''Played by''': Creator/MaayaSakamoto (voice, anime), and Mirei Kiritani (drama)

Rec's love interest and the reason he lives under the bridge. A {{Cloudcuckoolander}} who believes she's a Venusian [[spoiler:(she is actually from Venus, as it is revealed later in the story)]]. She has a strange obsession with fishing some of the creatures that live in the riverbed and provides them for the community.

* AmbiguouslyHuman: Nino is presented as someone who could be very human in appearance... unless her unfamiliarity with what a normal human would do (especially a human ''girl'') in a relationship, or the fact that she can ''breath'' under water, drop various hints that she isn't actually human.
* AttentionDeficitOohShiny: She has a short span of attention when things or situations do not interest her.
* BerserkButton:
** Listening to her most treasured tapes without permission makes her mad enough to climb a telephone pole.
** Trying to take Rec from her, gets some [[NotSoStoic interesting responses]], too.
* {{Cloudcuckoolander}}: She could be this if you don't buy her Venusian story... [[spoiler: [[ArkhamsRazor which is actually true]].]]
* ExpressiveHair: Her hair acts as an antenna for some weird reason.
* ForceFeeding: Her idea of hospitality around friends and her boyfriend, which is [[spoiler: a Venusian trait]], is force feeding them the fishes she caught for dinner.
* HairOfGoldHeartOfGold: She is a blonde, and her heart is too pure, considering that she is an stranger to normal earthling topics as "relationships". She can also sense from far away when a person is evil or not.
* HeroicBSOD: After she finds out that Hoshi [[spoiler:used her cosmic tapes to record a new song (and all the blame is turned against Rec)]], she gets mad enough that she climbs a telephone pole.
* HiddenBuxom: Since Nino is always seen wearing a tracker suit's jersey, no one could notice that she has big breasts.
* HumanAliens: She is originally presented as an [[AmbiguouslyHuman ambiguous human]] who claims to be from Venus, but actually [[spoiler: her claims are true, as she was left behind by her Venusian parents, under the care of the Mayor.]]
* InnocentBlueEyes: She has a pure heart and soul, and her naïvety is often played with in the rest of the series.
* InnocentFanserviceGirl: She used to take baths normally outdoors, but after a visit from the cops she began to use a ModestyTowel. [[spoiler: It's later revealed that, since she is actually a Venusian, she doesn't find it "weird" to be naked, but more "natural", although she feels it as a distant memory of her race.]]
* ManicPixieDreamGirl: Nino fills this role for Rec, though her personality doesn't fit very well.
* MasculineGirlFeminineBoy: She is the Masculine Girl to Rec's Feminine Boy, to some extent, as she is unfamiliar with what a normal girl is supposed to be doing in a relationship. That, and that Rec is supposed to have a "heart of a maiden".
* MegatonPunch: Is quite capable of taking out her anger on someone, due to her unnatural strength.
* MysteriousPast: Her past and her "I'm a Venusian" claims are deliberately left out of focus earlier into the series. It's later revealed that [[spoiler: she is really an alien, that she was left behind as some part of deal with the Mayor, and that Venusians are always fated to be with their "other halves" (they are always born in a pair of twins, and [[{{Twincest}} devote their love to each other]], but since her twin died in Earth, she was left behind).]]
%%* NoSenseOfPersonalSpace
* OfficialCouple: With Rec. [[spoiler: They become their respective literal "other halves" at the end of the series.]]
* OnlyKnownByTheirNickname: Her name comes from the tag "Class 2-3" (''Ni-no-san'') on the tracker suit's jersey that she always wears.
* ParentalAbandonment: [[spoiler: Her parents left her behind after her twin brother, her original "other half", died on Earth.]]
* SelectiveObliviousness: She ignores everything Hoshi throws her way, but if [[SingleTargetSexuality Rec does something romantic]], she's touched. That is, of course, "if" she notices it.
* SheCleansUpNicely: Just give her any kind of cute or pretty feminine clothing, and she would look gorgeous under Rec (and Hoshi)'s eyes.
* SingleTargetSexuality: Towards Rec, because not only she saved him from drowning at their first meeting, or because she wanted to be his girlfriend, it's because [[spoiler: Rec ended up being her "other half"]].
%%* SnotBubble
* TheStoic: Her face always shows a melancholic stare, rarely showing a smile. [[NotSoStoic Unless]], she shares moments with Rec and the rest of the villagers.
* SugarAndIcePersonality: Nino is notably seen as distant with whatever happens around her, unless she enjoys herself. It's even noted by the Mayor that she has ''changed'' once it seems that she fell in love with Rec, as well.
* VictoriasSecretCompartment: Nino keeps a lot of fish in her jersey's jacket.

!!The Mayor

->'''Played by''': Creator/KeijiFujiwara (voice, anime), and Shun Oguri (drama)

The head of the Arakawa community. An odd man that constantly wears a kappa suit, he manages to corral and lead the members of the village with a good amount of (misguided) skill.

* BunnyEarsLawyer: Although he is the ''crazy'' leader of the community, most of his actions [[spoiler:(especially outside the Arakawa's riverbank)]] are very competent in his own benefit. [[spoiler:It's unclear if the villagers are just playing along with him or not at the end of the series.]]
* ChekhovsGunman: [[spoiler: Who could have guessed that a man who believes he is a {{kappa}}, is actually one of the main moving figures behind the whole plot of the series? And only for the sake of Nino and the secrets that lay under the Arakawa's riverbed...]]
* {{Cloudcuckoolander}}: The Mayor claims he is a real kappa... but his [[PeopleInRubberSuits rubber suit]] differs. And everyone buys the idea that he is a mythical creature (even Rec, if only for a few minutes).
* CrouchingMoronHiddenBadass: He is one of the most mysterious people that live on the Arakawa's riverbank, as he has saved many of the villagers' lives in his lifetime.
* TheFaceless: We never see his real face. Not even when he is doing an illusion-magic performance or [[spoiler:when he is out of the kappa suit]].
* FullBodyDisguise: Despite his claims as a mythical creature, he is only wearing a disguise.
* LineOfSightName: This is how the Mayor names people once they become members of the community.
* ObfuscatingStupidity: The Mayor has had moments of deep insight at times, belying the aloof nature he normally sports. [[spoiler: This is also considering his "man behind the curtains" position, once he leaves the kappa suit aside]].
* ObliviousToLove: Seemingly everyone knows that P-ko loves him but ''him''. [[spoiler: At the end, it's implied that they end up together, or at least, live with each other]].
* PapaWolf: To Nino. [[spoiler: Especially considering the kind of deal he had with Nino's parents, that end up with him taking care of her.]]
* PeopleInRubberSuits: He is not a real kappa, just a man who is always using a rubber suit. HilarityEnsues when Rec is the only one who recognizes this.
* TeamDad: He is the highest-positioned member of the Arakawa's community, and although he is always ObfuscatingStupidity, he is always going to support everyone in the riverbank.


->'''Played by''': Creator/TomokazuSugita (voice, anime), and Takayuki Yamada (drama)

A former famous musician who hit rock bottom and now lives under the bridge. He's always seen wearing his trademark star mask. He's also in love with Nino and always tries to make Rec look stupid in front of her. Under the bridge, he provides all the music for events.

* ButtMonkey: Once Rec starts living in the riverbank, he gets on-par moments with him. He starts being the butt of the jokes once he finds out that Nino considers Rec as her boyfriend, but not him.
* TheChewToy: He ends up being put in a lot of painful situations.
* CrazyJealousGuy: Hoshi gets crazily jealous on Rec, just because of Nino. Although she barely [[ObliviousToLove even notices]].
* DoggedNiceGuy: Only to Nino. He has known her for a couple of years, and fell in love with her ''at first sight''. His plan was approaching her little by little to win her heart... until he hears that Rec is "her boyfriend". Instead of feeling fully rejected, Hoshi attempts to be more spectacular to gain her attention (because he notices that Nino and Rec's relationship doesn't advance too much).
* EvenEvilHasStandards: He wants and intends to ruin Rec. So, he was initially on board with Rec being hypnotized to "fall in love" with Amazoness... but he helps him break out of it because he prefers to win Nino with his own power, and not playing dirty tricks like this one.
* ExpressiveMask: He wears ''two'' masks to cover his face. How is it even possible to make expressions on them, is anyone's guess...
* TheFaceless: We never see how is Hoshi under his mask, we only know from [[AllThereInTheManual sketches]] and short appeareances of his real self, that he often wears sunglasses (due to his former [[{{Pun}} stardom]]'s status) and that he has short red hair.
* FunTShirt: Hoshi has some questionable fashion's tastes and he even does his own t-shirts, one noticeable being "ORE NO T-SHIRT" ("I'm a T-Shirt").
* HopelessSuitor: He is persistent to get Nino's attention, even after she mentions that [[SingleTargetSexuality she and Rec are a couple]]. No matter how ''many times'' he tries.
* {{Jerkass}}: He acts as petty and as a JerkJock around Rec.
* KarmaHoudini: He messed up Nino's treasured tape and Rec gets blamed for it.
* MomentKiller: Voluntarily (in front of Rec and Nino when they are dating) and sometimes even involuntarily.
* NotSoDifferent: Hoshi has more in common with Rec than he would expect.
* TheResenter: He is always going to be resentful towards Rec, and only because he "got the girl".
* SecretIdentity: Hoshi used to be a famous singer that even made it to the Oricon charts, but he lost his inspiration (his management never let him use his own songs) and became "Hoshi" to get away from everything.


->'''Played by''': Creator/TakehitoKoyasu (voice, anime), and Yuu Shirota (drama)

A former soldier that became a man of the (wrong) cloth once he came to Arakawa. He constantly carries all manner of guns with him and clearly still holds a military mindset. He provides church services under the bridge.

* AFatherToHisMen: He used to be in the military, and it is implied he was seen as such in his own squad (and that is also recurrent with the rest of Arakawa's community).
* HighPressureBlood: When he isn't capable of taking Maria's insults, blood comes out from his face's scar.
* HugeGuyTinyGirl: He is the tallest man of the Arakawa's community, so he is seen as a Huge Guy to every woman of the village, with noticeable exception to Amazoness.
* LivingLieDetector: He was in the military, so he can easily react towards anyone who may be lying in front of him.
* LoveAtFirstPunch: He met Maria in the middle of a battlefield when she used one of her attacks to leave him bald. He fell for her ''immediately''.
%%* LoveMartyr: To Maria.
* MadBomber: Has an obsession of throwing grenades everywhere.
* NunTooHoly: Sister takes seriously his position as a nun, although he is a paranoid soldier who threats the Arakawa's community by the gun.
* OneManArmy: He is huge, he has a military's past, and is well trained in the arts of camouflage and weaponry.
* OnlyKnownByTheirNickname: He is only known as "Sister", and nothing else more.
* PerpetualFrowner: He rarely is seen with a smile on his face, due to his military's training.
* PersonOfMassDestruction: Sister is, perhaps, the most dangerous person in the Arakawa's village.
* PhenotypeStereotype: It's unclear from where exactly is Sister, although Stella's past (as he directed her orphanage) suggests he may be English or European as well.
* ScarsAreForever: Due to his HighPressureBlood coming out from a scar that is across his face, it's evident that it frequently opens, and it will never heal.
* TheStoic: He is a PerpetualFrowner who rarely express emotions... [[NotSoStoic unless his]] [[{{Jerkass}} crush's insults get to him]].
* TriggerHappy: Sister has been described as a "paranoid former soldier" by some of the villagers, so no one has to wonder why he points them out with guns in some "life-or-death" situations.
* WholesomeCrossdresser: Sister uses a nun's habit (though his military suit is below it) almost all the time, but there are ocassions (either in {{Imagine Spot}}s or acting scenes) he will use other feminine clothes such as a schoolgirl outfit, complete with a [[HairDecorations barette]].


-> '''Played by''': Creator/ChiwaSaito (voice, anime), and Eri Tokunaga (drama)

A young girl from England who was raised by Sister in an orphanage. She has a noticeable crush on him and appears sweet in general, but she is actually highly skilled in martial arts and is rather accomplished in several underworld trades. She can also transform herself into a musclebound man three times her size thanks to Sister's training. She serves as a yakuza boss for the community.

* AgeLift: In the drama, Stella is portrayed as a teenager (a bit older than the Iron Brothers) instead of a child.
* ClingyJealousGirl: She ''doesn't'' take it well when she finds out about Sister's feelings for Maria. [[spoiler:She changes her mind at the end, as she sees Sister and Maria as part of her "family".]]
* DeliberatelyCuteChild: She is first introduced as an innocent child (even Rec falls for it)... but she is actually a CuteBruiser who will beat you up.
%%* DragonLady: Humorously subverted.
* EnfantTerrible: Don't fall for her cuteness... because you will get hurt. And she was trained by Sister, from all people.
* GirlishPigtails: She uses them as her trademark hairstyle.
* HairOfGoldHeartOfGold: Subverted. She's young, cheerful and cute, but she's quite the EnfantTerrible.
* HulkingOut: She transforms in a [[Manga/FistOfTheNorthStar Raoh]]-kind-of-clone if she gets ''very'' pissed off.
%%* LittleMissBadass
* LimitedWardrobe: She is mostly seen wearing a cutesy feminine dress, with some obvious exceptions (she also uses pajamas). Her drama counterpart is seen wearing a mixed variety of clothes, one layer over the other.
* PrecociousCrush: She is implied to have a crush on Sister, because he took care of her when she was younger, although it seems that she [[spoiler:changes her opinion once the series is ending]].
* UndyingLoyalty: If she wanted, she could be a {{yandere}} towards Sister, but since he raised her for a time period in an orphanage, she is loyal to him in ''any'' kind of situation presented.


->'''Played by''': Creator/MiyukiSawashiro (voice, anime), and Nana Katase (drama)

A former spy who came to live under the bridge. A sadist at heart, she delights in emasculating every man in the community, especially Sister, with whom she has a history. She runs a sheep farm for the community.

* BerserkButton: It's implied that she and Sister were former lovers, since every time Sister slips his tongue into his military's memories, she would attack him with a pair of scissors, ''from across the riverbank''.
* BitchInSheepsClothing: Maria is a sadistic farmer that enjoys her free time bullying and insulting the men of the Arakawa's village. She is only sweet to the rest of the female villagers.
* TheBully: As the sadist that she is, she likes to insult the many men around the community (with exception of the Mayor), although her biggest victim is Sister.
%%* DarkActionGirl
%%* DoubleStandardAbuseFemaleOnMale
* CoolBigSis: She acts as such, bordering even at OneeSama territory, although exclusively for the girls and children. The male part of the riverbank's village usually receives a solid portion of bitchiness hidden behind a beautiful smile.
%%* FauxAffablyEvil
* IShallTauntYou: Her addiction is insulting every man of the village, until their spirit to continue living, dies as well.
* NotAMorningPerson: She becomes a "monster" if she wakes up earlier.
* PetTheDog: Her treatment of Stella after their "duel".
* RoseHairedSweetie: The BitchInSheepsClothing variant -- she's only sweet at first glance. She's actually a sadist who loves to bully others. She can be nice to the girls, though.
* ShearMenace: Maria threats others with her scissors.
* TheSociopath: ComedicSociopathy at most, but in the episode 7 of season 2 [[spoiler:she actually goes ''insane'' while locked for several days with the people she feels she shouldn't be bullying (ie. girls)]].
%%* TranquilFury
* TheVamp: Maria comes from the "treat men like shit and they'll be fawning over you" variety. It works perfectly with Sister, after all.
* YouGottaHaveBlueHair: Her hair is pink, which stands out since everyone else in the cast has realistic hair colors.

!!The Iron Brothers (Tetsuo and Tetsuro)
[[quoteright:134: http://static.tvtropes.org/pmwiki/pub/images/autb_twins_4199.png]]

->'''Played by''': As Tetsuo, Creator/YukoSanpei (voice, anime), and Takuto Sueoka (drama).
-> As Tetsuro, Creator/RyokoShintani (voice, anime), and Raito Mashiko (drama)

A pair of brothers always seen wearing iron helmets. They claim to have been experimented on and have psychic powers, which are only kept in check by the helmets. They are very lively and run an oil drum bathhouse under the bridge.

* CainAndAbel: Subverted, since Tetsuo and Tetsuro don't hate each other enough to sacrifice one over the other (although it's implied this ''could'' happen since they are growing up, and one of them falls in love with Stella).
* {{Deliberately Cute Child}}ren: They are a pair of cute children who always do things together. They ''sometimes'' mean no harm to others, unless they are obeying Stella's orders.
* {{Expressive Mask}}s: They do not take their masks out, so instead, these always express their emotions. This is, however, subverted in the drama, since they look more as tin-luchador masks.
* TheFaceless: In a similar case as Hoshi's and the Mayor's, their real faces are never revealed to the readers and the viewers. The few glances of them only happen in the finale.
* HulkingOut: Given the circumstances of training with Sister, they suffer a similar transformation as Stella. Although, they only spend transformed for a while.
* MrImagination: Rec considers that the Iron Brothers are actually "chuunibyou" if they aren't what they claim to be.
* PowerLimiter: Their masks can control their psychic powers, gravity and also shut down the Government's GPS. Or so they claim.
* PsychicPowers: They claim that they have such, but they are never shown in the whole series. Of course, who would tempt them to use them if they are paranoid of the government and according to them, their powers are too ''powerful''?
* PuppyLove: One of the twins is in love with Stella.
* ThemeTwinNaming: They are the '''Tetsu'''jin Brothers, '''Tetsu'''o and '''Tetsu'''ro.
* WonderTwinPowers: They imply that if they aren't together, their psychic powers may not work. This is the reason of why they fear if one of them gets caught first.

!!Toru "Shiro" Shirai

->'''Played by''': Creator/HochuOtsuka (voice, anime), and Toru Tezuka (drama)

A former salaryman who now lives under the bridge. He can't go anywhere unless he's able to walk on a white line, so he always walks with a field striper.

%%* CrouchingMoronHiddenBadass
* DisappearedDad: Hasn't seen his wife or daughter for six years, though they don't seem to mind and they fully encourage his dreams of becoming a champion liner.
* NiceGuy: He is one of the nicest guys you will ever find in the series.
* ObliviousToLove: He doesn't recognize that [[spoiler:Shimazaki]] loves him with a passion.
* {{Salaryman}}: What his former job was, later, he instead wants to become the most recognizable "white lining walker" in the entire world.
* SuperOCD: He believes that, if he walks out off his white line, his wife and child would become ''chicken''. And since no one can prove him otherwise, the rest of the community don't want to risk it.
* SmarterThanYouLook: Despite his looks, or the fact that he was a failure as a salaryman, he is actually one of the smartest members of the community. [[spoiler: He even is in charge of a "Change your job" fair inside the Arakawa's community.]]


->'''Played by''': Creator/ChiakiOmigawa (voice, anime), and Natsumi Abe (drama)

A young woman who lives under the bridge during the growing season. While cute, she's horribly clumsy. She has an unrequited love in the Mayor. She runs a vegetable farm for the community.

* {{Adorkable}}: Even when P-ko messes up something, she comes up as a very adorable young woman who tries her best.
* AmbiguouslyHuman: Or so she claims. [[spoiler: She hints that there is a ''slight'' probability that she is [[{{Cloudcuckoolander}} actually part vegetable]]]].
* BananaPeel: Taken UpToEleven with SlipperySkid in her first appearance.
* ButtMonkey: The first one among the girls, starting with her SlipperySkid in her first appearance... or when she gets depressed after [[ObliviousToLove the Mayor doesn't recognize her love]].
* CurtainsMatchTheWindow: Her eyes are red as her hair.
* CuteClumsyGirl: She is ''very'' clumsy, compared to the rest of the girls of the Arakawa's community.
%%* DrivesLikeCrazy
* ExpressiveHair: Her [[AnimeHair unusual pepper-like hairstyle]] often reacts to her emotions.
* FieryRedhead: She gets too passionate with her vegetable farming.
%%* TheHeart
* HopelessSuitor: She doesn't mind if the Mayor rejects her or ignores that she has feelings for him, she would always pursue his love. [[spoiler: It's implied to be averted by the end of the manga, as she is seen living with him...]]
%%* NaiveEverygirl
* OlderThanTheyLook: She is 22 years old according to [[AllThereInTheManual the official info]] but looks somewhat younger.


->'''Played by''': [[Creator/YuichiNagashima Cho]] (voice, anime), and Kazuyuki Asano (drama)

Rec's assistant from his company. He came searching for Rec when he never came back to the office. He is steadfastly loyal to his boss, but also has a very unhealthy obsession with him. He oversees the running of Rec's company in his absence and helps Kou with his projects under the bridge.

* ArrangedMarriage: [[spoiler: To Nino, and only because he got (accidentally, thanks to the influence of the Venusian Ghost) "approved" by her parents. He later calls out the wedding ceremony, because he can't ''betray'' Rec and his own principles]].
* BrainwashedAndCrazy: [[spoiler: He got stuck with Rec in their trip to Venus, although he is shortly eaten by a rabbit-like monster (and this bring several sequels to Rec once he came back to Earth) when they land. He was saved by a Venusian Ghost who brainwashed him afterwards with the only condition of getting Nino back to Venus. He eventually gets better once Rec stops him.]]
* EveryoneCanSeeIt: Everyone knows he's in love with Rec... whether they want to or not.
* IncompatibleOrientation: With Rec, who is straight.
* ManHug: He goes after them often with Rec.
* PapaWolf: He is ''very'' protective of Rec, ever since he considered himself as his dad's replacement.
* StraightGay: He only acts feminine when he is preparing food or other home made stuff for Rec. It's up to interpretation if he does so because he sees him as his son, or because he wants Rec to see him as a ''potential'' lover.
* SubordinateExcuse: Despite his weird attraction to Rec, he sometimes ''is'' useful.
* YouDontLookLikeYou: [[spoiler:Upon his return after his "supposed" death in Venus, his appearance gets drastically different than his usual self -- he looked manly and less StraightGay and affectionate to Rec.]]


->'''Played by''': Creator/RieTanaka (voice, anime) and Waka Inoue (drama)

Takai's assistant, a beautiful, but somewhat shady lady, who seems to play her own game under both Rec's and his father's heads.

* BeautyMark: She has a mole under her left eye.
* {{Brainwashed}}: She gets known as the "Queen of the Brainwashed" in-series, because she became brainwashed very frequently.
** The first time is when she just suffered a HeroicBSOD, [[spoiler:after finding out that Shiro actually has a family and that he hasn't got divorced from his wife. To make matters worse, she is contacted by a Mole who was willing to know and reveal the secrets of the Arakawa's riverbed. Then, she becomes TheMole for him.]]
** The second time is when she gets [[spoiler: convinced by a fortune teller. However, she becomes rather useful when Rec was looking for Nino in the last arc of the manga]].
* EnigmaticMinion: Under the Arakawa's community, she becomes TheMole for Rec's dad, since she is more loyal to him than Rec himself. The Mayor then threatens her to finish the research about the riverbank and Nino. She gets later convinced by the same Nino to stay there with the rest of the community.
* TheMole: [[spoiler: This is her basic role to obtain information about the Arakawa's riverbed and Nino. Once under Rec's father, and another under the Mole's guidance.]]
* SingleWomanSeeksGoodMan: After going to the bridge for the first time, she falls in love with ''Shiro'', after he helps her to get out of Sister and Maria's trap. Admittedly, there ''was'' a bit of ComicallyMissingThePoint involved, too.
* StalkerWithACrush: Once she gets brokenhearted [[spoiler:after finding out about Shiro's family... she becomes obsessed with him so much, that she even kidnaps him]].

!Seki Ichinomiya

->'''Played by''': Creator/RikiyaKoyama (voice, anime), and Takaya Kamikawa (drama)

Rec's father and CEO of one of the most powerful companies in the city, if not Japan. He firmly believes in never being indebted to anyone and has instilled that in Rec, for his entire life. A cutthroat businessman, he gets what he wants when he wants it and proudly stands tall over his accomplishments.

* DisappearedDad: He had a rare presence in Rec's childhood (he would rarely eat with him in the table and such), while the "dad" role went to Takai, one of his assistants. It's suggested that he feels [[spoiler:[[TheResenter resenful]] over his wife's death, so he maintains a distance from his son]].
* FourEyesZeroSoul: Subverted. He's very harsh and curt with Rec, but he does have some love for his son.
* HumiliationConga: In a situation that briefly parallels to his own son's first encounter in the Arakawa's bridge, he leaves the place all classy and looking so cool he annoys the policeman.
* PapaWolf: Despite what he claims, he protects his son from the sidelines.
* ScaryShinyGlasses: Due to his strict personality and rare presence in Rec's life, there are times that he gets uncounsciously scared by his glasses-wearing image...

!!Last Samurai

->'''Played by''': Creator/YuuichiNakamura (voice, anime), and Taro Suruga (drama).

Once a master hairdresser and an attractive man, he got sick and tired of his lifestyle and ran away with little more than a katana from his family's house. After an accidental meeting with the Mayor under the bridge, his "samurai spirit" was awakened, and now he speaks in an older Japanese dialect and wears a topknot as he lives with the community by the Arakawa river. He still uses that same katana to cut the hair of the Arakawa people.

* EverythingsBetterWithSamurai: He is considered as the "last" one of them, obviously. He is also a fan of Ryouma Sakamoto [[spoiler: he also writes a blog under this identity]].
* HopelessSuitor: He has a crush on P-ko, and he later learns that she is never going to stop loving the Mayor, despite her [[ObliviousToLove attempts]]. He sometimes [[{{SelfDeprecation}} self-deprecates himself]] knowing that she would never change her opinion on him.
* ImportantHaircut: He used to be a normal hairdresser, until he got sick of his lifestyle and ran away from home. He cut of his hair as a meaning of "new beginning" once his "samurai spirit" was awakened in the Arakawa's riverbank.
* {{Keigo}}: His formal speech reflects his old-fashioned sense as a "samurai".


->'''Played by''': Creator/FumihikoTachiki (voice, anime), and Norihisa Hiranuma (drama)

Rumored to have once been the boss of a Yakuza-like gang of bird-headed people, and supposedly betrayed their trust when he fell in love and eloped with the bee princess Jacqueline. It's debatable how much of that story is true, but what is known is that he is deeply in love with her.


* AlwaysSaveTheGirl: As long as the girl is Jacqueline, he is always going to be there for her.
* EvenTheGuysWantHim: Or, at least, they cannot help swooning over his manliness in Rec and Hoshi's cases.
* AFatherToHisMen: How the birds' yakuza sees him (he is their "big brother"), since he is always in the peak of sacrificing himself for their sake... or the sake of the riverbank's villagers.
* InterspeciesRomance: Due to their eccentric natures, both him and Jacqueline consider their relationship as this.
* RatedMForManly: He is the ''manliest'' of all men in not only Arakawa's riverbank, but ''also'' in Japan.
* SatelliteCharacter: He almost always appears alongside his partner, Jacqueline.
* SickeninglySweethearts: He is {{tsundere}} towards Jacqueline, although he is madly in love with her. That was the reason alone he had to betray his mob group.
* SingleTargetSexuality: He has no eyes for other woman (or man), except for Jacqueline.
* {{Tsundere}}: He is a tsuntsun towards Jacqueline, as he may look aloof from her. But his dere shows off when he ''really'' means she is the world to him.
* {{Yakuza}}: He was part of a mob group, and understands how the underworld works -- he has seen his comrades suffer through several incidents and he even sacrificed himself over his love to Jacqueline, who was also a mob queen (depending on the source, she was either the lover or wife of Billy's ''own'' mob boss, or she was the lover of a rival mob's boss).


->'''Played by''': Creator/YukoGoto (voice, anime), and Kurume Arisaka (drama)

A woman in a bee costume who fell madly in love with Billy and is practically inseparable from him. She runs a day spa called "Queen Bee" under the bridge.

* DamselInDistress: She seems to be physically helpless, which allows Billy to always come to the rescue.
%%* TheDitz
* DragonLady: Prior to coming to Arakawa, she was a former yakuza queen.
* InterspeciesRomance: This is how she interpret her relationship with Billy, since she is a "queen bee" and he is a bird.
* SatelliteCharacter: To Billy, because they are an inseparable couple.
* SickeninglySweethearts: She is madly in love with Billy.
* SingleTargetSexuality: Jacqueline doesn't have any eyes for any other man than Billy.

!!Captain a.k.a. "Potachi"

->'''Played by''': Creator/TomokazuSeki (voice, anime)

A {{mangaka}} who publishes his works under the pen name "Potato-chip Kuwabara." A total sci-fi geek who likes to think of himself as a space captain defending the Earth from aliens. He becomes interested in the people living under the bridge when he sees Nino, who he thinks is a Venusian plotting to destroy the planet.

* {{Brainwashed}}: [[spoiler: He gets involved in some conspiracy's organization that promises him to reveal some of Nino and the Arakawa's riverbed's secrets.]]
* CaptainSpaceDefenderOfEarth: He believes that his real role in the world is that he should protect the world from evil venusians, and his way to warn people about it, is through his sci-fi manga's pages. He ''believes'' Nino is an alien-princess that would destroy the world.
* CreatorBreakdown: InUniverse. He ran away from his career as a mangaka when his [[ExecutiveMeddling editor kept forcing him]] to draw {{Moe}} manga instead of sci-fi.
* TheMole: [[spoiler: His own desire to defend the Earth is what the Mole's organization wanted to use in their own benefit. Although, he still has some affection to the Arakawa's community. He is self-aware that the Mole is full of "bad" people, but his only motivation to keep doing so was because he just wanted to keep playing as [[TheHero a hero]], no matter what side he takes.]]


->'''Played by''': Creator/YuuKobayashi (voice, anime)

A mysterious Amazon woman who lives down the river, outside the riverbank's community. Her personality constantly shifts from that of an intimidating warrior to a high school girl. She's rarely seen without her cell phone and has a love of all things made in Saitama. She works for an unknown person and is often accompanied by a trio of "tengu" (guys with tengu masks and bikini tops worn over their t-shirts) who act like her "big brothers".

* AmazonianBeauty: Has the body of an Amazon, but the heart of a high school girl.
* HopelessSuitor: She thinks she is this to [[spoiler:Hoshi]].
* NoGuyWantsAnAmazon: This is what she believes, because she is too forceful onto the guys she likes. Her "brothers" seem to think otherwise, though.
* SheCleansUpNicely: Without the heavy make up, and despite the Amazonian-body and disguise, she can look really pretty and very normal, just like a high school girl. However, she gets easily too embarrassed by it.
* {{Stripperiffic}}: Her outfit goes along with the Amazon warrior theme, but it leaves very little to the imagination.
* TinyGuyHugeGirl: To Rec. [[spoiler:And Hoshi.]]
* {{Tsundere}}: {{Lampshade|Hanging}}d by Rec and it's as creepy as it sounds, because she can be a violent tsuntsun.
* UncannyValleyMakeup: Her make-up makes her look as she could be straight from a "horror" movie.
* ValleyGirl: What her Saitama dialect is often translated as.

!!The Tengu Brothers

->'''Played by''': Creator/YuuichiNakamura (voices, anime)

The trio of "tengu" that live with Amazoness in the south part of the Arakawa's riverbank. They consider themselves as her "older brothers", as they often worry about her, especially in love matters. They will do everything for her, even if it implies using their mystical powers to obtain results. Amazoness refers to them as "women", since they use bikini tops over their t-shirts.

* BigBrotherInstinct: They feel like they are responsible for the well-being of Amazoness, and they often take it overboard, even hypnotizing the parties involved to "convince" them that they "love" her.
* TheFaceless: They hide their faces under tengu masks, and there are rare sights of their faces in some manga panels, when they talk serious about their "sister".


A very famous idol and model in Japan.

* AscendedExtra: Who would have expected that the famous idol outside the Arakawa's riverbank would play an important role later into the series? [[spoiler:Better yet, making a personal proposal to Rec to join the riverbank's community after he found out he was as ''weird'' as the rest of the villagers?]]
* EvenTheGuysWantHim: Rec, Hoshi and Last Samurai swoon over him a LOT. They tend to "invoke" their Kameari-tis when they have to think as "teenage girls". No wonder he gets particularly scared of ''this'' when he finally meets Hoshi and Last Samurai in the riverbank.
* MaybeEverAfter: [[spoiler:At the end of the manga, it's implied that he and the Venusian Ghost got together.]]
* WalkingSpoiler: Especially for those that only stayed out with the anime, due to his AscendedExtra appearance late into the manga series and his role as a major player in the last arc.
* WillingChanneler: [[spoiler: Kameari accepts being the human host of the Venusian Ghost as part of a deal regarding his nudity's obsession. It's this possession where he realizes he has a mutual connection with him as his possible ''other half''.]]