Stella

Stella is an orphan who came to Japan to see Sister, who used to watch over her in England. Stella is very protective of Sister which made her hostile towards Maria when she first arrived. Stella is left with Kou Ichinomiya when everyone else runs away from watching her. She calls Kou her "Big Brother".

When Kou asks her what she wants to play she says "Fight Club". When Kou failed miserably, he lets Stella hug him and she says "From now on, you belong to me.". Stella when angry turns into a very masculine, muscular version of herself.

She gets called Boss by the Iron Brothers and sees them as her underlings.

Trivia

 * The name Stella means "star" in Latin.