Raspberyl "Beryl"

About

Raspberyl is the childhood friend of Mao, who goes by the nickname Beryl. When the player first encounters her, she thoroughly introduces herself as such, and further refers to herself as the "Heroine of the game." She then challenges Mao to a fight, both in an attempt to protect Almaz from him, and to maintain her status as "badass" by keeping him from becoming a hero.

(Source: Disgaea Wiki)