Kijou Mami

Masaharu's sister. She likes to wake her brother up with a morning blowjob every day and frequently tries to convince him to commit incest. On her route she becomes Magical Mamirin. Uses her position as a new magical girl to trick her brother into raw baby making sex until he admits he likes it.

Spoiler

She knows Enbi-fuku Kamen and Mesu-dorei A-ko are her parents but doesn't bother telling Masaharu.