!!Kazuoki Marin
* ApologizesALot: Marinís always apologizing for reading peopleís thoughts. [[LampshadeHanging Lampshaded]] in a string of apologies between her and Lucan.
* BelligerentSexualTension: With Kaius.
* FriendlessBackground: The Newcomer type.
* MasculineGirlFeminineBoy: Although Marin is not entirely masculine, she seems so next to the very feminine and girlish Haruhi; it helps that Marin used to be very boyish (complete with boyish haircut) as a child. Ryuu [[LampshadeHanging lampshades this]].
* NaiveNewcomer: Marin has no idea where to go the first day sheís at school. If youíre not paying attention, she also forgets her class number.
* SecondYearProtagonist
* {{Telepathy}}: Marinís psych.
* {{Tomboy}}: Marin was this in her childhood. She even had the short haircut to match.
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!!Kaius
* [[spoiler: AccidentalMurder: To his mother,]] due to his PowerIncontinence.
* BelligerentSexualTension: With Marin.
* BreakHerHeartToSaveHer: Being a {{Jerkass}} to Marin so she won't get close enough to him to get hurt.
* BrutalHonesty: Kaius doesnít pull his punches in criticizing Marin.
* DefrostingIceQueen
* FriendlessBackground: The Loner type.
* [[PureEnergy Energy Blasts]]: Kaiusís psych, which activates whenever he feels strong negative emotion.
* GlowingEyesOfDoom: Kaiusís blue eyes get brighter and sharper when heís angry.
* HatesBeingTouched
* IcyBlueEyes
* JerkWithAHeartOfGold: Kaius has a rude personality, but Marin finds out that he also has a motherly side when she discovers that he has been caring for orphaned kittens.
* {{Jerkass}}: Ryuu even calls Kaius this verbatim at one point.
* KindheartedCatLover: Kaius has a soft spot for kittens. Also for cats when [[spoiler:he and Marin adopt one together]].
* LonersAreFreaks: The schoolís perception of Kaius, since he refuses to talk to anyone, takes mostly private classes, and doesnít reveal his psych to anyone.
* MisunderstoodLonerWithAHeartOfGold
* OneHeadTaller: Kaius is six and a half feet tall, clearly much taller than anyone else in the school.
* PeekABangs: Kaiusís hairstyle. There are rumors that [[GlowingEyesOfDoom his hidden eye is cursed]].
* PetTheDog: Him taking care of stray cats.
* PowerGlows: Kaius glows bright blue when heís using his psych.
* PsychoticSmirk: Kaius flashes one of these before he beats up the thugs trying to rape Marin.
* RedOniBlueOni: Kaius is the Blue Oni to Ryuuís Red Oni, resulting in a lot of fights between the two.
* SuperpoweredEvilSide: Kaiusís personality seems to shift into this when he uses his psych, regardless of whether he actually really has an evil side.
* {{Tsundere}}
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!!Takishima Ryuu
* AllGirlsWantBadBoys: According to Ruiko, Ryuu is popular because heís such a bad boy.
* AttentionWhore: Ryuuís very photogenic, and loves the attention he gets from his fangirls.
* TheCharmer: He's generally a very friendly, outgoing and flirty guy.
* DontYouDarePityMe: He doesn't tell Marin about [[spoiler:his heart condition]] because he wants her to treat him normally and not as someone to be pitied.
* HeavySleeper: Despite Lucanís best efforts to wake him, Ryuu can sleep through being hit, being splattered with water, and having heavy objects thrown at him.
* IJustWantToBeNormal: Ryuu doesnít want to be treated as different, even if [[spoiler:he has a life-threatening heart condition]].
* [[spoiler:IllBoy]]: Due to his [[spoiler:heart condition]].
* IWantMyBelovedToBeHappy: In Lucan's path.
* {{Keet}}: Ryuu never seems to run out of energy or smiles.
* LethalChef: When Marin tastes the bento that Ryuu made, she notes that the meat is overseasoned, undercooked and practically raw. On the contrary, Ryuu thinks itís delicious.
* ManChild: Ryuu has a few of these tendencies, such as his enthusiasm at getting to play in the rain or ride the swings at the park. His excuse is that [[spoiler:he never got to do those things as a kid because he was either at home or in the hospital]].
* NoSenseOfPersonalSpace: Ryuu has just met Marin, but heís very friendly and never misses a chance to tease her about being romantically involved or get physically close to her in some way.
* PowerAtAPrice: The reason why Ryuu faints so much is because he does not have enough energy to teleport as often as he would like due to [[spoiler:his heart condition]].
* RedOniBlueOni: Ryuu is the Red Oni to Kaiusís Blue Oni. He seems to think theyíre [[TheRival rivals.]]
* SincerityMode: When he confesses to Marin, she doesn't take him seriously at first, assuming that he sees her as just another conquest. It isn't until later that she realizes how much he cares.
* StepfordSmiler: He's very good at hiding [[spoiler:his insecurities and health problems]] underneath his carefree disposition. It's most noticeable when he forces himself to smile after [[spoiler:Marin initially rejects his love confession.]]
* {{Teleportation}}: Ryuuís psych. [[TeleportSpam He uses it to his advantage when in a fight with Kaius.]]
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!!Saimori Lucan
* ApologizesALot
* TheBeautifulElite: Marin compared Lucan's looks to a princeís.
* BigBrotherInstinct: Lucan has four younger sisters, so taking care of Marin comes naturally to him.
* BigManOnCampus: Lucanís the most popular guy in school, has his own UnwantedHarem and definitely qualifies as one of TheBeautifulElite. [[spoiler:It's [[{{Deconstruction}} deconstructed]] on his route when it's revealed that he's actually terribly insecure, and the main reason he's so popular is that he unconsciously brainwashed the girls around him into loving him out of fear of being alone.]]
* {{Bishonen}}[=/=]PrettyBoy: More so because of his slightly longer hair and his acknowledged pretty boy looks in-universe.
* BrokenAce: Type 1 variant. While he seems like a NiceGuy and the resident BigManOnCampus on the surface, he's guilty of [[spoiler:[[MindControl brainwashing the girls in the school to love him]]]]. Although, to be fair, Lucan contends that he did so unconsciously. However, there's no excuse when he intentionally [[spoiler:[[MindRape brainwashes Marin]] [[{{Yandere}} into one of his fangirls]] [[NotGoodWithRejection after she rejects him]]]].
* CrashIntoHello
* HouseHusband: He's an [[SupremeChef excellent cook]], and good at sewing too.
* LuminescentBlush: Out of all the guys, he's the one that blushes the most by a wide margin.
* MindOverMatter: Lucanís psych.
* NiceGuy: He's consistently sweet, awkward, and an overall gentleman towards Marin. [[spoiler:Unless Marin rejects him after she learns about his dark secret. Then he becomes [[MindControl not so nice]] [[{{Yandere}} anymore]].]]
* NotGoodWithRejection[=/=][[spoiler:{{Yandere}}]]: If Marin rejects Lucan after she learns about [[spoiler:his unintentional {{brainwashing}} of multiple girls, he ''intentionally'' brainwashes her into forgetting this and becoming as mindlessly devoted to him as his fangirls]]. Marin's profile even gains [[spoiler:MindControlEyes]] after he does this. Brrr.
* ParentalAbandonment
* PromotionToParent
* PsychoticSmirk: Lucan has a secret creepy smile that really freaks out Ryuu.
* RealMenCook[=/=]SupremeChef: Lucan makes all his lunches by himself, which consists of [[SweetTooth only sweets and baked goods]]. He thinks itís embarrassing, but Marin reassures him that itís something to be proud of.
* SweetTooth: Lucan only eats desserts for his meals.
* [[spoiler:{{Telepathy}}]]: Lucan found out that he [[spoiler:was born with two psychs. This is the other one, although itís less hearing other peopleís thoughts and more MindControl]].
* WhatTheHellHero: Gets this when Marin finds out his secret.
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!!Ruiko
* ButtMonkey: In-universe, Ruiko seems to be this to the other students. Sheís the target of their pranks, and all of her previous roommates requested a room change after having spent one day with her.
* ClingyJealousGirl
* {{Cloudcuckoolander}}
* {{Fangirl}}: Ruiko is an avid fangirl of both Lucan and Ryuu. She even heads Lucanís fanclub.
* GirlsLoveStuffedAnimals: At least Ruiko sure does. Theyíre all over her room.
* IntangibleMan: Ruikoís psych.
* StalkerWithACrush: Lucan really doesnít like the [[{{Fangirl}} attention Ruiko gives him]]. Especially concerning those compromising photos of him she posted on the internet.
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!!Okazaki Haruhi
* ChildhoodFriendRomance: Of the unrequited kind. Haruhi has feelings for Marin, but he hasnít confessed them and she doesnít seem to feel the same way about him. [[spoiler:That is, unless you choose him over Kaius.]]
* HeIsAllGrownUp: When Marin is expelled from Planets and returns home, she finds that Haruhi has finally hit puberty and has adopted a boyish image.
* {{Keet}}: Haruhi is always happy to see Marin.
* WholesomeCrossdresser: Haruhi thinks itís amusing when people mistake him for a girl.
* WhyCouldntYouBeDifferent: Haruhiís parents wanted [[spoiler:a girl instead]], which is why he [[spoiler:dresses like one]] to try and please them. Which they don't approve of, so they eventually [[ParentalAbandonment disown him.]]
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!!Oginuma
* AmazinglyEmbarrassingParents: When he first meets Marin, Oginuma insists that she call him Ogi-chan and conveniently mentions the fact that Kaius doesnít have a girlfriend.
* HeWhoMustNotBeSeen: InUniverse, he is also the principal of Marin's old school, but no one there ever sees him because he spends most of his time at (P)lanets.
* OlderThanTheyLook: Marin comments that Oginuma looks more like Kaiusís brother than his father.
* OpenMindedParent: Oginuma is oddly encouraging when he realizes that Kaius and Marin are a couple, going so far as to encourage them to have sex after their first date.
* RenaissanceMan: Oginuma has mastered almost all of the psychics's powers.
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