Passionate Sports Girl: To a small degree. She's very athletic and a member of the school's tennis team, not to mention she's a rather decent player in her own.
Convenient Miscarriage: Was pregnant with Jin's baby before marrying Youji, but it was a stillborn. Her mother wrote a rather confusing letter about it to her... Yuu found it and mistakenly thought it referred to him.
Cool Big Sis: To Miki, since she doesn't want to be pushy to her.
Kick the Dog: Hiding Miki's medallion (or bracelet, in the manga), then giving it to Yuu and saying that she threw it away because she doesn't like him anymore. Yuu isn't fooled, but it still brings a huge rift between them.
Just a Kid: Miki thinks so. He's very unhappy about that.
Stage Mom: Both of his parents were this. He ran away from home because of their pressure on him. They get better.
Took a Level in Kindness: In the anime, when he re-appears long after his arc is over, he's much more mature and kinder.
Suzu Sakuma
Book Dumb: Horrible in math. Her cousin Satoshi gets Yuu to tutor her.
What the Hell, Hero?: On Ginny, when he learns about her terrible prank on Miki. He's so pissed off that not only he calls her an horrible person, but he slaps her. Beware the Nice Ones, indeed.
Dumb Blonde: More like "selfish and childish blonde" than truly dumb.
Kick the Dog: Telling Miki that she was Yuu's "other woman" as a prank, out of jealousy. This makes the already distressed Miki break up with Yuu in the airport, as she's too emotionally exhausted to handle a Long Distance Relationship.
Must Make Amends: Does show genuine regret once reality sinks in.
Lovable Alpha Bitch: While she is shallow and flighty, she's not completely evil.
Brainy Brunette: Has light brown hair and is very perceptive and smart
Cool Big Sis: Specially to Ginny, whom she treats like a little sister. She isn't thrilled, however, as men only see her as a friend and not as a prospect girlfriend.