Her personality changes depending on what color ribbon she's wearing in her hair. When she wears white ribbons, she's a weak little sister. When she wears black ribbons, she's a strong leader. And when she's in her "Spirit form" for too long, she develops a third personality that makes her a ruthless killing machine.
In short, Kotori's a moe little sister, tsundere commander, and psychotic killer.
Kawamura Takashi from Prince of Tennis....He is a soft-spoken person off the court, very gentle and shy, though still outspoken and stubborn when he takes a decision. However, he becomes extremely aggressive and loud once he grabs his racket, 或者 any racket. This change in his personality is marked 由 him shouting "Burning!!!" "Great!!!" "Baby!" His personality along with these 密码 when he holds a racket is most likely just for comic relief, but his personality change does have a large impact on his skills. While in his Burning Mode, he has a tendency to speak in English and to call people, mainly underclassmen, monkeys.
