A list of characters of Sakurasou no Pet na Kanojo, most of which reside in the titular Sakura Hall, a wooden two-storey house harboring some of the quirkiest students of Suimei University of the Arts High School ("Suiko" in local parlance). Some spoilers for the light novels are left unmarked, so read at your own risk.
The male protagonist, a insecure second-year high school boy who chose to move to Sakura Hall rather than throw away a stray cat he had found. In there, however, being surrounded by talented yet quirky peers, however, has taken a toll on his ordinary life, more so when he meets Mashiro, who indirectly inspires him to carry on with his dream of developing video games. He lives in Room 101.
Can't Catch Up: Towards Mashiro, who he feels is leagues above him in a lot of things. A pretty brutal example of this happens in episode 21, when his game pitch fails again, and then the game company that rejected his proposal sends Mashiro an offer to create characters for their games, without her even trying to do it.
Not What It Looks Like: He is in a lot of these thanks to Mashiro. Often in those situations she will also say things either out of context and/or order, making others (especially Nanami) think he and Mashiro has done This and That.
Only Sane Man: Poor guy has to deal with the crazies in his new dorm (including the landlady, no less). The only reason he's even in the Sakura Hall is because the regular dorms won't let him keep a cat. Then, as it turns out, he is also this to his own family.
While he does have the traits of this trope, in Sakura Hall, he's not actually the only sane one as there is also Jin and Nanami.
Parental Abandonment: He originally lived in the neighborhood with his family, but stays behind in a dorm after his father found a job in Fukuoka, then moved there with both his mother and his little sister Yuuko.
Performance Anxiety: Suffers this in Episode 8 during his presentation for his video game idea. Naturally, this doesn't go very well for him. Subverted come Episode 10, where he performs just fine.
The Resenter: Occasionally becomes close to this in terms of resenting Mashiro for her talent while his hard work fails him. He ended up lashing out at her a few times, but he managed to prevent himself from becoming this and stayed close friends with her.
The Sleepless: He suffers from this trope occasionally due to Mashiro sleeping in his room, and especially during the school festival where he was working long hours to ensure his project for it would be done in time.
The female protagonist, a gifted yet somewhat strange second-year transferee to Suiko after living for many years in England to learn how to draw manga. Early on, she exhibits a total lack of knowledge in any other skill than drawing, including basic hygiene and social skills. For this reason Sorata was assigned as her caretaker. She lives in Room 202.
Ambiguous Disorder: Despite her behavior, it's never outright stated that she has a mental disorder. So far, the closest thing her dormmates did to name her a disorder was for Sorata to call her "special", having been fed up with her antics earlier that day.
Animal Motifs: Cat. Unfortunately, while Mahiro seems to like them, the feeling is not mutual.
In Episode 7, after seeing Sorata take a grain of rice off Yuuko's face, she puts one on hers, prompting Nanami to take it off. A moment later, Sorata sees both Yuuko and Mashiro putting grains of rice on their faces.
In Episode 8, Mashiro decides to stay in his room after he says Nanami would get upset seeing her in there. Later, she seems annoyed that Sorata compliments Nanami's bikini, but won't do the same for hers.
In Episode 9, when Mashiro saw Rita lying on top of Sorata, her only interactions with him for the next few hours was calling him "idiot" each time they pass each other. Later, after clearing things up, she invites Rita — whom she previously kicked out the dorm — to sleep in her room to prevent a repeat of said incident.
In episode 18, while walking with Sorata and Nanami to see if Yuuko passed her entrance exam for their school, she has an inkling that Sorata and Nanami like each other, and changes the tone of her voice enough that both of them notice she's upset.
Hey You: Due to lack of social skills, she never uses Japanese Honorifics. Partially justifiable by spending most of her youth in Britain.
Idiot Savant: One of the very few Japanese examples that does not involve martial arts. She doesn't seem to know how to clothe herself decently on her own, nor does she have much common sense, such as when she opens a snack and eats it in the store before paying for it. However, she is an extremely talented artist and devotes heavily to that field of study.
Innocent Innuendo: Very common as well, also due to her complete lack of social skills.
Episode 2: Sorata's been her first... male friend.
Episode 5: She pretty much implied she has been doing This and That with Sorata all night—in front of Nanami—while that "this and that" was merely playing video games.
Innocently Insensitive: Tends to speak embarrassing and/or insulting things to other characters in a matter-of-fact tone, without considering how would they feel. Sorata is currently helping her become more socially adept.
Instant Expert: In Episode 5, she completely flops all her tests, including English, much to Sorata's consternation, considering the fact that she spent most of her childhood in Britain. Later she was given some study sheets, and instantly remembers all the information on it, which Sorata briefly tests her on. She later aces all her retests.
Intelligence Equals Isolation: It's not intelligence per se, but it operates the same way— Rita revealed in Episode 10 that as her talent was far ahead of her peers that every one of them except Rita quit in shame. Of course, she is totally oblivious of that. This trope still applies as of now, as Sorata lampshaded.
Literal-Minded: When asked what she was thinking, Mashiro answers instead with exactly what is she thinking at the moment (such as "Of the Earth").
Meaningful Name: "Mashiro" means "pure white". Not only does he have a fairer skin than the rest of the cast, it is pretty clear that Sorata even thought she is "pure to a fault".
Sorata's classmate, who later transfers to Sakura Hall, another second-year high school girl, and an aspiring voice actress. Because her parents disapprove of her chosen career, she runs away from home, forcing her to work in multiple part-time jobs to earn money so she could transfer to a voice acting school. She lives in Room 203.
Animal Motif: Tiger, demonstrated from her stuffed tiger Torajirou and tiger-striped panties. (Interestingly, in Mashiro's manga Nanohana-sou—a replica of what happens in the Sakura Hall—Mashiro's male stand-in is called Toratarou.)
Bunny-Ears Lawyer: Slightly downplayed compared to the others, but she's strict about everything.
Refuses to talk to Sorata during the first half of Episode 2 due to some out-of-context dialogue regarding Sorata being Mashiro's "first", at least until Mashiro clears it up.
Again in Episode 5, upon moving to Sakura Hall because she wanted to see what kind of relationship Mashiro and Sorata had, after Mashiro discussed said relationship in a way that made it sound like "dating".
In episode 9, both her and Mashiro seem a bit upset at Sorata when they see Rita on top of him in his room when Nanami goes to wake him up for school.
Covert Pervert: She owns some rather fancy underwear, and her usual reaction whenever confronted by a strange situation is to assume the most perverted possibility.
Heroic BSOD: Gets a delayed one of these after finding out she failed her audition. At first, she seemed well-adjusted to the bad news. This was disproved in the next episode when she emotionally broke down in the middle of school.
Hopeless Suitor: Towards Sorata. She may have a chance before Mashiro came into the scene, but...
Romantic Runner-Up: Due largely to her being unable to confess her feelings for Sorata sooner, she falls into this trope. In episode 22 she essentially gives him a speech that ends up "friend-zoning" herself towards him, but she likely did it because even if she did confess by that point, he'd reject it and would make their friendship awkward.
A third-year student and Misaki's childhood friend. Despite his genuine feelings for Misaki, he feels she is too talented for someone like him, a struggling playwright, so he instead becomes a playboy. He lives in Room 103.
Anchored Ship: With Misaki. Luckily, their issues were eventually resolved.
Berserk Button: REALLY does not like the idea of Misaki being with another guy, even if it's just hypothetically suggested.
Best Her to Bed Her: Misguidedly subscribes to this trope as something he must do before he can be with Misaki.
Can't Catch Up: Towards Misaki, who feels his scripts aren't on par with the level of talent Misaki shows in her creations. This is another reason why he constantly brushes off her advances, as he feels he's not good enough for her and would just weigh her down.
The Casanova: While he remains loyal to his childhood friend Misaki, Jin feels unworthy of her, so he becomes this instead.
Chivalrous Pervert: In Episode 3, Sorata tells Jin to return to the dorm to comfort a heartbroken Misaki, who saw him and Mashiro in front of a Love Hotel. He declines, saying he'd be tempted to do perverted things to Misaki were he to see her like that, which he doesn't want.
Fatal Flaw: Is smart, mature, and cool. But is deeply afraid and insecure about a potential romance with Misaki, which causes quite a bit of pain for both of them (and their friends). He eventually overcomes this though.
Hopeless Suitor: He feels he's not good enough to be with Misaki, due to her talents, such as in animation, and feels he would just weigh her down if he tried to have a serious relationship with her. This despite the obvious signs that Misaki really wants to be with him.
A third-year student, Jin's childhood friend, and a hyperactive artist, whose obsession with anime and manga forced Suiko's higher-ups to send her over to Sakura Hall. She is openly in love with Jin, despite the latter's womanizing habits. She lives in Room 201.
Animal Motif: Bears; she seems to be a fan of a nameless bear mascot.
An second-year boy (yes, that's a he) and a talented computer programmer... who just happens to be a shut-in, communicating only with his dormmates through "Maid", an AI program he developed (and whose avatar Misaki created). Eventually he comes out of his room and starts attending Suiko. He lives in Room 102.
Brutal Honesty: He did not hide why he comes out to attend classes (to obtain enough attendance points to go to college), and, of course, towards Rita in episode 10, when he sees right through her "fake smile" and tells it like he sees it. It doesn't go very well with her.
Freudian Excuse: He once had friends and was working on a game with them, but his Insufferable Genius tendencies and the fact he was more skilled than any of them could hope to be eventually caused them to gradually step away from him, until he was left alone.
Insufferable Genius: When he finally shows up in Suiko after five months, Ryuunosuke doesn't even bother listening to the teacher's lecture. He also eats tomatoes loudly in class, which the teacher finds irritating.
What the Hell, Hero?: In Episode 10, after Rita explains how she failed to meet expectations due to being overshadowed by Mashiro, Ryuunosuke calls her out on trying to appease others' expectations of her more than following her true desire.
Mashiro's cousin, landlady of Sakura Hall, and an art teacher at Suiko. Despite that, she's more interested in drinking and dating. She's also irresponsible towards her special cousin, forcing Sorata to become her caretaker, and even then she'd give him improper, irrational advice.
Adaptation Dye-Job: Is clearly blonde in the light novels. She is strangely made red-haired in the anime, possibly to better contrast her from Mashiro.
Bunny-Ears Lawyer: Used to be an aspiring artist back when she was her tenants' age, but has since become a teacher instead.
Cat Smile: She displays one in Episode 2 when talking to Sorata at school.
Mashiro's former handler during her stay in England. She was also an aspiring artist, but, driven by envy over Mashiro's superior talent, Rita "encourages" her to transfer to Japan to draw manga. Soon she regrets her decision, so she travels to Japan to persuade Mashiro to return with her, all to no avail. She eventually returns home, but not before making a most curious acquaintance in the form of Ryuunosuke.
The Atoner: Comes to Japan to try to bring Mashiro back to England after regretting her decision to send her to Japan.
Cry Cute: Breaks down in tears in Mashiro's arms in Episode 10 after the latter allays her fears of being unneeded by confessing that she feels complete when painting with Rita.
Freudian Excuse: Failure to meet others' expectations, compounded by being constantly one-upped by Mashiro, forced her to stop painting. Ryuunosuke calls her out on it, noting how she failed to consider what she really wanted to do.
Genre Savvy: She knew Sorata would come outside looking for her when she first visits Sakura Hall. Later she tells Sorata to go to a hotel with her, knowing full well that Nanami and Mashiro would attempt to spy on them, and greets the two girls at the entrance.
Green-Eyed Monster: In Episode 9, she tells Sorata about how she used to paint, until constant overshadowing by Mashiro forced her to stop. She also delivered that message in a tone that implies she still harbors some resentment against Mashiro.
Love at First Punch: Finds herself strangely attracted to Ryuunosuke after the latter saw through her "fake smile" and then called her out on her Freudian Excuse for stopping her artistic career. Alas, Ryuunosuke is gynophobic.
Sorata's younger sister and a third-year junior high school girl who looks too young for her age. She enters Suiko and stays in the Sakura Hall in the seventh book of the novels.
A-Cup Angst: She goes through this while groping Mashiro and Nanami in Episode 7. Jin tries to cheer her up by yelling that she'll get bigger come high school.
Annoying Younger Sibling: Visited Sorata at a most inopportune time (just when he was waiting for the results of his video game thesis) to pester him with questions regarding school life after some out-of-context conversation with their mother over Sorata's relationship with Mashiro.
Clingy Jealous Girl: Almost instantly disliked Mashiro and Nanami for taking up most of her brother's time, though she eventually softens up to Mashiro after she comes to understand the latter's condition.
Grew Beyond Their Programming: Thanks to Ryuunosuke's updates, her auto-filtering ability soon expanded into autonomous filtering, rapid word-learning, facial expression recognition, virus creation, and even hacking.
Robot Maid: Her avatar, complete with a tail-like appendage ending with a USB plug.
Yandere: Played for Laughs. When Rita started showing affection for Ryuunosuke, the latter, ever the gynophobic, chooses to spare himself the inconvenience of having to directly communicate with Rita by having "Maid" filter all her messages and love letters... who proceeds to start an online Flame War with her.
Voiced by: Taishi Murata
Sorata and Nanami friend and classmate. He has a crush on Nanami.