!! '''Number One Starship Crew'''
!!!'''Rei the Number One Star/Zero the Burning/Zero the Silver/[[spoiler: Zero the Hurricane/Zero the Flash/Zero the Azure/Zero the Glint]]'''
[[quoteright:321:https://static.tvtropes.org/pmwiki/pub/images/rei_20.png]]
[[caption-width-right:321:The Number One Star!]]
[[caption-width-right:350:[[labelnote: Zero the Burning]]\\
https://static.tvtropes.org/pmwiki/pub/images/zerotheburning.png]][[/labelnote]]
[[caption-width-right:350:[[labelnote: Zero the Silver]]\\
https://static.tvtropes.org/pmwiki/pub/images/zerothesilver_2.png]][[/labelnote]]
[[caption-width-right:350:[[labelnote: Zero the Hurricane]]\\
https://static.tvtropes.org/pmwiki/pub/images/zerothehurricane.png]] [[/labelnote]]
[[caption-width-right:350:[[labelnote: Zero the Flash]]\\
https://static.tvtropes.org/pmwiki/pub/images/zerotheflash.png]][[/labelnote]]
[[caption-width-right:350:[[labelnote:Zero the Azure]]\\
https://static.tvtropes.org/pmwiki/pub/images/zerotheazure.png]] [[/labelnote]]
[[caption-width-right:350:[[labelnote:Zero the Glint]]\\
https://static.tvtropes.org/pmwiki/pub/images/zerotheglint_7.png]] [[/labelnote]]
->Voiced by: Creator/YuuichiNakamura
The main hero of the story. Rei is obsessed with being number one. [[spoiler: He doesn't remember his past]] but doesn't seem to care very much. He is an ultimate-user, who has an unusual ultimate symbol on his heart. [[spoiler: He eventually gains ultimate cards of all six colors, and a separate form for each.]]

* AllLovingHero: Anyone is a "serious friend" to him, even those who have really done nothing to deserve the title. As more proof that he's one of these, Ultimates find him worthy left-and-right.
* [[spoiler: AmnesiacHero: He woke up with two Ultimates, and didn't remember anything before that.]]
* {{Catchphrase}}: He has at least one per form.
** "The Number One Star Burns Bright Red! There's no one Stronger than Me." (Burning), "The Number One Star shines white! Sound the song of victory!" (Silver), [[spoiler: "A favorable wind for sailing! It's a Tailwind!" (Hurricane), "Well then, let's meet again in a wonderful hell." (Flash), "No enemy can block the path to my boundless future!" (Azure), "That was Zero the Glint!" (Glint)]]
* CurbStompBattle: He tends to have these with the Triumvirate, with Rei of course being the one doing the stomping.
* ElementalHairColors: Each of his forms comes with an appropriate hair-color change.
* HotBlooded: Especially as Zero the Burning.
* [[spoiler: IdolSinger: This is Zero the Glint's motif]]
* InterspeciesFriendship: Two of his closest friends are Mugen (a dragon) and Salt (a robot).
* InvincibleHero: He effortlessly beats nearly every opponent. [[spoiler: Unlike all previous Battle Spirits protagonists, he's able to beat his rival in one try.]]
* InvoluntaryDance: [[spoiler:Zero the Glint hypes up the spectators in this way before summoning his yellow Ultimate.]]
* LargeHam: All of his alternate forms. Just look at some of the catchphrases. Yuichi Nakamura does an amazing job overracting. [[spoiler: Glint particularly stands out, for treating his battle like a concert, complete with an imaginary audience he encourages to cheer for him.]]
* [[spoiler: LaserGuidedAmnesia: Both he and Kiriga have this at the start of the series.]]
* MeaningfulName: It means "Zero".
* TheRival: To Kiriga
* SplitPersonality: [[spoiler: At least 6 of them]], which he switches to at will based on what color deck he uses.
* TrademarkFavoriteFood: Pizza
* WhyDidItHaveToBeSnakes: In his case, why did it have to be ghosts?

!!!'''Mugen'''
->[[quoteright:180:https://static.tvtropes.org/pmwiki/pub/images/screenshot_2017_07_09_16_05_34.png]]Voiced by: Creator/YukaIguchi
Mugen is Rei's dragon companion. He is actually a spirit, and turns into a card to battle. He is a huge Magical Star Saki fanboy.

* AccessoryWearingCartoonAnimal: He has a scarf
* BadassAdorable: Although his actual spirit forms are less cute, they're still the same character.
* ADayInTheLimelight: Interestingly, he gets this in the form of the series 3rd ED theme, Endless Nova. It tells a lot about his background that isn't covered in the actual series.
* BalloonBelly: Sometimes he inflates when he is really angry, or about to fart.
* CrossdressingVoices: he's voiced by Yuka Iguchi
* EvolutionPowerup: Several times. [[spoiler: The last time, he becomes an ultimate.]]
* {{Fartillery}}: Frequently the method he'll use to send the Triumvirate blasting off.
* FartsOnFire: at one point Mugen actually farts fire at the Triumvirate. In fact there is even a card of Mugen farting fire called [[http://battle-spirits.wikia.com/wiki/Mugen_Flame Mugen's flame]]
* {{Fanboy}}: Of Magical.
* {{Gasshole}}: And how, Farting is one of Mugen's most defining Characteristic. Usually he farts at Triumvirate or anyone he's really mad at or don't like.Sometimes he even use his farts to attack his opponents in game. In the earlier episodes Mugen would often let out a huge fart when he changes from a red spirit to a white one.
* [[spoiler: IneffectualLoner: He seems to have been this before meeting Rei.]]
* [[spoiler:[[JapaneseDelinquents Japanese Delinquent]]: He seem to have behaved like this before meeting Rei,he even dressed like one too.]]
* NonHumanSidekick: To Rei
* RedOniBlueOni:The red oni to Ian's blue oni. Mugen is more hotheaded and boisterous while Ian is more calm and collective, [[LiteralMetaphor And Mugen is actually red while Ian is blue.]]
* SeriesMascot: He definitely seems like it.
* SnarkyNonHumanSidekick: He can be sometimes when he gripes about how careless Rei or the others can act.

!!!'''Laila April'''
->Voiced by: Creator/MariyaIse
Laila is the older sister of Rikuto, and a Pentan-user. She is very unskilled as a card battler. Her hobby is cleaning.

* {{Fangirl}}: To Eris, bordering on LesYay.
* HairTriggerTemper: She tends to get mad pretty easily. Although, often it's because of how unnaturally crazy or lax Rei is acting in any given situation.
* NeatFreak: Her love for cleaning is probably unhealthy.
* PluckyGirl: Although rarely ever effective, she is at least constantly determined, and will do her best to act strong if the situation calls for it.
* RaisedByGrandparents: Both she and Rikuto had their grandfather David as their parental figure.

!!!'''Rikuto April'''
->Voiced by: Creator/RieKugimiya
Rikuto is the younger brother of Laila. Like his sister, he isn't very good at Battle Spirits. He gets along very well with Rei.

* TheCutie: He's about the sweetest and most innocent character in the show.
* MementoMacGuffin: The space compass he carries. While it's an important item to the plot in general, being able to locate the Ultimate Battle Spirits, it's also from his dead grandfather.
* RaisedByGrandparents: Both he and Laila had their grandfather David as their parental figure.

!!!'''Salt'''
->Voiced by: Creator/JunFukuyama
Salt is a robot cook who serves on Rei's ship. He met Rei in a trash heap, and the two became friends ever since. He can only cook pizza, but can make almost endless varieties of it.

* {{Fanboy}}: Of Magical.
* MeaningfulName: He's a cook.
* PungeonMaster: He's constantly making food puns.
* RobotBuddy: Though, normally he doesn't do much other than cook and spout puns. He's later shown to have a Battle Spirits deck of his own.
* TeamChef: Literally his main purpose in the story.

!! '''The Guild'''
!!!'''Kiriga the Shooting Star'''
->Voiced by: Creator/JunichiSuwabe
Kiriga is a powerful member of the guild, who often does tasks for Miroku. Like Rei, he has a dragon companion. [[spoiler: He also has a missing past, and an ultimate symbol on his heart. Eventually, he leaves the guild and finds his memories on his own.]]

* TheDragon: He serves as this for Miroku at the start of the series.
* [[spoiler: ForcedIntoEvil: It's later revealed that he was following Miroku because Miroku had his memories which he wanted back.]]
* [[spoiler: HeelFaceTurn: He eventually leaves the guild, and decides to fight against the invaders from the other dimension.]]
* [[spoiler: LaserGuidedAmnesia: Both he and Rei have this at the start of the series.]]
* TheRival: To Rei

!!!'''Ian'''
->Voiced by: Creator/RyokoShiraishi
Ian is Kiriga's dragon companion. He is extremely loyal to Kiriga. He usually doesn't get along well with Mugen.

* AccessoryWearingCartoonAnimal: He wears glasses.
* EvolutionPowerup: Several times. [[spoiler: Eventually, he gets an ultimate form.]]
* {{Fartillery}}: Although he doesn't do this as often as Mugen.
* {{Gasshole}}: Somewhat, nowhere near to the extent of Mugen however.
* [[spoiler: HeelFaceTurn: Alongside Kiriga. Though, he was never really bad. He simply follows Kiriga everywhere he goes.]]
* NonHumanSidekick: To Kiriga
* RedOniBlueOni:Blue oni to Mugen's red oni. Ian is more calm and collective while Mugen is more hotheaded and boisterous. [[LiteralMetaphor and Ian is actually blue while Mugen is red]]
* UndyingLoyalty: To Kiriga. It's obvious he doesn't think highly of the guild, but he sticks around because of Kiriga. [[spoiler: And you can see how much it pains him having to watch Kiriga get tested by Ultimate-Grand-Woden]]

!!!'''Miroku the Omnipotent[[spoiler:/Colin]]'''
->Voiced by: Creator/HiroShimono
Miroku is the guild's leader. He keeps his face hidden under a visor. He tends to act very sadistic. [[spoiler: Miroku's ultimate objective is for all of space to be his. To carry this out, he summons users of the Reverse 12 Zodiac Braves from an alternate dimension, to combat the Ultimate-users.]]

* BigBad: He's the leader of the guild.
** BigBadDuumvirate [[spoiler: With [[SealedEvilInACan Nakes the Ophiuchus]]. Soon after Nakes is released, he consumes Miroku, making the two of them effectively one being.]]
* [[spoiler: EvilFormerFriend: He used to be good friends with Rei and Kiriga.]]
* EvilLaugh: He starts doing this quite a bit later into the series.
* {{Expy}}: He has a lot in common with Zazie in Brave. They're both masked white-haired villains with an alter ego, not to mention massive trolls. Both try to summon an Ophiuchus card [[spoiler: and the process involves sacrificing their own supposed allies.]] Miroku even imitates Zazie's battle style.
* TheFaceless: [[spoiler: Until episode 39.]]
* KickTheDog: He regularly tortures the Triumvirate, sometimes seemingly for no real reason. [[spoiler: He takes this cruelty a step further after stripping Hansoro of his memory, blowing up his ship, and leaving him to die in the snow.]]
* OneWayVisor: [[spoiler: And when it comes off, beware.]]
* [[spoiler: TechnicolorEyes: Each of his eyes are made up of three of the colors in Battle Spirits.]]
* WhiteHairBlackHeart: [[spoiler: Before he was evil, his hair was green.]]
* YouHaveFailedMe: It's obvious he does not have much tolerance for failure. He finds inventive ways to torment the Triumvirate whenever they mess up [[spoiler: and when Hansoro betrays him... it gets much worse.]]

!!!'''The Galaxy Triumvirate (Tsuruhashi the Waking, Hashibuto the Angry, Watari the Flowing)'''
->Voiced by: Creator/MamoruMiyano (Tsuruhashi), Creator/KenjiNomura (Hashibuto), Creator/KappeiYamaguchi (Watari)
The Galaxy Triumvirate is a team of guild members. They want to steal the space compass for Miroku, but constantly fail. All three of them were former performers. Tsuruhashi is known for rapping, and uses red. Hashibuto is a feminine crossdresser, who uses purple. Watari is a Magical Star fanboy, who uses white.

* CardCarryingVillain: They seem to very much enjoy being evil.
* CreepyCrossdresser: Hashibuto. And to go along with the look, he's often attracted to other men.
* {{Fanboy}}: Watari is one for Magical. The other two don't get the appeal.
* FriendlyEnemy: Occasionally. [[spoiler: A later episode reveals that Rei has always considered them serious friends.]]
* [[spoiler: TheGlassesComeOff: Well, replace nerd glasses with nerd goggles, and this applies to Tsuruhashi, who becomes a much more powerful card battler once they're removed.]]
* IneffectualSympatheticVillain: Unsurprisingly, they quickly fall into this.
* IronButtMonkey: They costantly go through torture from Miroku that should kill them, if this series were more realistic.
* PaperThinDisguise: They've done this a couple of times, and it always works.
* PetTheDog: There is a whole episode devoted to Watari (and the others by extension) helping Magical get a break from her work by pretending to kidnap her. Though it backfires for them, Magical was still very thankful.
* TerribleTrio: They're basically Team Rocket.
* VillainsOutShopping: In episodes where they're not bothering Rei and the others, they tend to be doing mundane things, such as performing on stage.
* VillainousCrush: Watari has one on Magical.

!!!'''Hansoro'''
->Voiced by: Shigeo Kiyama
He is a top follower of Miroku. [[spoiler: When Miroku begins summoning the 12 Reverse Zodiac Brave users, Hansoro starts doubting his intentions. He eventually tries to betray Miroku.]]

* [[spoiler: LaserGuidedAmnesia- Gets this after losing to Miroku, and doesn't even remember his own name.]]
* WellIntentionedExtremist: He is a strong supporter of the guild [[spoiler: because he believes that if everyone follows their code, it will put an end to conflicts over cards. Although he was disturbed by Miroku's true ambitions, note that one thing Hansoro was in support of was the Seven Galaxy Generals, who enforeced the guilds law by going around oppressing people.]]
* WorthyOpponent: He considers Rei and Kiriga this.

!!!'''Basilla the Dawn'''
->Voiced by: Creator/TetsuInada
The leader of the Seven Galaxy Generals. He steals one of the faucets from Planet Faucet, to make better pickled vegetables. He is also an ultimate user. [[spoiler: After losing to Rei, he reforms himself, and goes off to raise vegetables.]]

* [[spoiler: CallToAgriculture: He goes on to raise vegetables, which he considers his children. [[SincerityMode And then eats them.]] ]]
* [[spoiler: DefeatMeansFriendship: After losing to Rei, he becomes one of Rei's serious friends. He also disbands the Seven Galaxy Generals and decides to reform himself.]]
* GirlishPigtails: Given that he's a guy, they look quite strange.
* [[spoiler: TookALevelInKindness: You would not believe the Basilla shown later in the series is the same person.]]

!!!'''Rukinosu the Cancer'''
->Voiced by: Creator/YasuhiroTakato
He is one of the Reverse 12 Zodiac Brave users, based on Cancer the Crab. Miroku summoned him into the body of a stuffed animal. He is always seen eating crab.

* CarnivoreConfusion: He's a crab who eats crab. Let that sink in.
* FunnyAnimal: Albeit an evil one.
* [[spoiler: IneffectualSympatheticVillain: Not as much as the Triumvirate, but after seeing him lose to both Kiriga and Eris, and then get easily eliminated by Magical Star in the Justice Cup, only to be mocked by both Denebola and Miroku, it's hard not to feel sorry for him.]]
* MeaningfulName: He is named for Karkinos, a crab in greek mythology.
* VillainDecay: Big time. Went from being a dangerous new enemy that was able to easily defeat both Kiriga and Eris to a complete loser overnight and now he is no longer taken seriously and is now easily defeated by Kiriga, Eris, and Magical Star of all people.
* VillainousGlutton: He is constantly devouring crabs, leaving a mess behind him.

!!!'''Denebola Legulus Le On'''
->Voiced by: Creator/YukoKaida
She is one of the Reverse 12 Zodiac Brave users. She believes herself to be a big star, and constantly acts showy and egotistical.

* CatGirl: Actually, lion girl.
* DarkActionGirl: As one would expect, she's an extremely dangerous card battler.
* MeaningfulName: Denebola is a star in Leo.
* SomethingAboutARose: She's always carrying one around.

!! '''Venus Crew'''
!!!'''Eris the Morning Star'''
->Voiced by: Creator/YuiHorie
Eris is the leader of a crew of just pirates, who oppose evil. She is an ultimate-user who has a yellow deck. [[spoiler: She later finds a dragon partner in Chocola, and gets chosen by one of he Tri-Dragon Deities, allowing her to gain an ultimate symbol like Rei and Kiriga's.]]

* ActionGirl: [[spoiler: She eventually gets chosen by a Tri-Dragon Deity, and gains an ultimate symbol just like Rei and Kiriga]]
* AmazonBrigade: She has an all girl crew. Also, her deck, which is composed of female spirits/Ultimates [[spoiler: including her Tri-Dragon Deity.]]
* BadassNormal: [[spoiler: At least she was in the beginning of the series. Then she becomes chosen like Rei and Kiriga, becoming an EmpoweredBadassNormal]]
* [[CelibateHero Celibate Heroine]]: She makes it clear that her love is space, and she has no interest in romance.
* EvenTheGirlsWantHer: She is admired by Laila, and has an all-girl crew who also seems to adore her. Marlene and Garbo have actually been shown getting jealous of Laila.

!!!'''Marlene'''
->Voiced by: Creator/KaoriFukuhara
A member of Eris' crew, who seems to be the mechanic. She is the youngest of 10 children, which she resents somewhat.

* ActionGirl: Doesn't get as much chance to show it as Eris or Garbo, though.
* MassiveNumberedSiblings: There are 10 children in her family
* SatelliteCharacter: To Eris. At least, unlike Garbo, she is given a bit of backstory and some time to bond with Rikuto.
* ShipperOnDeck: She and Garbo ship Eris/Kiriga.

!!!'''Garbo'''
->Voiced by: Creator/RyokoShiraishi
A member of Eris' crew.

* ActionGirl: Her first scene involves her breaking into Basilla's ship to steal a card. She also battles.
* SatelliteCharacter: Although she gets a fair amount of screentime, she has virtually no role in the story other than her part as a crew member of Eris'.
* ShipperOnDeck: She and Marlene ship Eris/Kiriga.

!!!'''Chocola'''
->Voiced by: Creator/SakiFujita
[[spoiler: Eris']] dragon companion. She thinks of herself as a lady. Very excitable, she will usually repeat all her words.
* BatmanCanBreatheinSpace: She was able to talk, take a deep breath and blow away a nebula. All while being in the vacuum of space
* BalloonBelly: She had this when she inflated herself when taking a deep breath before blowing a way a nebula.
* BeautyIsNeverTarnished: Played straight, She is the only one of the three chibi dragons that doesn't use {{fartillery}}.Probably because she's the only out of the three that's a girl or because she wants to be seen as a lady and as we all know real ladies don't do fart jokes.
* [[spoiler:EvolutionPowerup: She gets an ultimate form.]]
* NonHumanSidekick: To [[spoiler: Eris]]
* SuperBreath: was able to blow away a nebula..with her breath...[[BatmanCanBreatheinSpace in space]]
* SweetTooth: She seem to really enjoy sweets


!! '''Other'''
!!!'''Magical Star Saki'''
->Voiced by: Creator/SakiFujita
Magical Star is a popular idol. She also plays Battle Spirits, using a purple deck.

* {{Fangirl}}: She turns into a huge one around [[spoiler: Zero the Glint. She doesn't have the same reaction to any other version of Rei, though.]]
* GirlsLoveStuffedAnimals: She's always carrying a bear around.
* IdolSinger: And a very popular idol at that.
* {{Kawaiiko}}: Of course, she is an idol.

!!!'''Fairy'''
->Voiced by: Yu Serizawa
A schoolgirl who's father was once close friends with Kiriga. [[spoiler: She travels with him to help him find his memories.]]

* CrushBlush: Gets this a lot when her feelings for Kiriga are bought up.
* TheGlomp: This girl dives from a space ship onto Kiriga, who was then floating on an inflatable raft, knocking both of them into the water.
* PrecociousCrush: On Kiriga, whom she seems to be quite a bit younger than. Not too extreme though, as Kiriga is about 17.
* SchoolUniformsAreTheNewBlack: She wears her uniform even when on spring break.

!!!'''Samantha'''
->Voiced by: Miyu Kubota
A schoolgirl and friend of Fairy's.

* GadgeteerGenius: Implied to be this. She's at least shown to be very good with bombs and spaceships.
* SchoolUniformsAreTheNewBlack: She wears her uniform even when on spring break.
* ShipperOnDeck: She seems to support a relationship between Fairy and Kiriga
* SmartPeopleWearGlasses: Of course she's a {{Meganekko}}