The protagonist of this story. A 19-year-old computer science student of INA University. A pessimistic guy but nevertheless trying to finish college. Loves anime and manga. Somewhat a pervert but often (poorly) tries to hide it. Likes quiet and demure girls. Says he hates Leda for being a tomboy but secretly likes her. He is surrounded by weird people but can also be weird himself. He ALWAYS appears in a worst time possible.

A 18-year-old computer science student of INA University. The SO (significant other) of the protagonist. Acts like a tomboy most of the time but thankfully doesn't dress like one. Totally opposite of what Vincent likes in the girl. She has this unusual ability of getting things (often weapons) out of out of nowhere. Occasionally beat the life out of Vincent when he's being a pervert. Often says that she hates Vincent (who says likewise) but in the middle of the story, develops feelings for him.

A 21-year-old computer engineering student of INA University. A sly talker and a "people" person. Loves to have fun but acts sternly when needed to. Seems to have a magnetic personality with high school students which is often pointed out by his friends (much to his dismay). Becomes the "senpai" in his circle of friends although he didn't approve of it. Likes the night-life and has many experiences with it.

A 20-year-old computer science student of INA University. Loves anime and manga like Vincent and Joseph. Often sings in a high pitched voice (like a seiyuu) that often annoys Joseph. His love for anime and manga often leads him to own several Japanese books and oftentimes communicate like so (and annoys Nando to no end). Has an uncanny way of obtaining money.

A 21-year-old computer engineering student of INA University. Loves anime and manga leading him to meet others that like it too. Often notes other people's behavior (even writing it down) and adjusts to it. Hates Vincent's pessimistic ideas. Likes to annoy and preach to Vincent (especially his pessimistic behavior). Loves to draw anime style. Likes company. Follows people he's interested in and often times gets branded as a stalker.

A 19-year-old computer engineering student of INA University. Loves the nightlife like Fernando although they don't often go together. He is an absolute playboy and acts like a gigolo in front of new girls. Loves fun but can be serious in his studies when needed to. Drags Vincent to night-places quite often which he always fails to (but for how long?)

A 16-year-old senior high school student of the all-girl university of St. Paulo which is nearby INA University. Falls in love with Nando the moment she laid her eyes upon him. Often goes around telling everyone that she's Nando's girlfriend (that annoys Fernando greatly). Very possessive of Nando and confronts every girl that goes near him. Loves fun and games and often neglects her studies. A genius in cooking and a natural leader.

A 21-year-old computer engineering student of INA University. An extreme lover of games (which he is extremely good at). Doesn't like to lose and gets pissed off when disturbed while he's playing. Often smokes in packs (it's a wonder he's still alive). Really scared of being sick which explains his dislike for food in *turo-turo stands. He studies but easily gets tired of it. Often influenced by people around him quite easily. Prods other people, especially Joseph, to smoke like him.

A mysterious person who can't be recognized because of the tons of smoke that surrounds his face. Many believe that this person is actually Kyo. But they can't really be sure...

A 19-year-old computer science student of INA University. Has a reputation of being sarcastic. Hates attention-seekers but doesn't do anything about them. His bag carries EVERYTHING he needs. He's not very comfortable when Vincent is around. Sometimes pops-out suddenly and often with great timing (but not necessarily for everyone).

A 24-year-old student of INA University. Has been at the university too long (I wonder why?). A pervert and is proud of it. He's not embarrassed even when he is declared a pervert in front of a girl. Likes high school  girls but unusually repels them. Is very jealous of Nando's high school girl attraction ability. Influences Vincent of some of his perversion.

An engineering professor of INA University. A seductive professor who is admired by almost 98% of all male population in INA University. She is quite oblivious of all the attention she is getting, though. No male has ever turned down any favors that she asks. Vincent often gets nosebleeds in front of her when she establishes eye contact with him. Her vital statistics are 36-23-32 (in inches) and likes sweets very much. ^_^

Ruel

A 16-year-old student of an all-boys school of St. Andrey which is just in front of St. Paulo. Has an extreme crush on Michelle (it would explain his extreme hatred for Nando). He's an anti-social loner. Often watches Michelle from afar; almost like a stalker. Has a hard time talking when in front of a group.