Caster

Caster is a beautiful, young fox woman with long pink hair tied into pigtails and yellow eyes with bright orange fox ears. She wears bright blue Japanese stylish erotic dress with two separate long blue sleeves, indigo long socks with black geta, and light orange fox tail.

Caster is sometimes comic relief, being a goofy, silly, and cheerful young fox woman. She sometimes take the battle and the situation by each week of the game seriously.

She's one of the Tamamo Nine members.

(Source: TYPE-MOON Wiki)