フィー=キステルミット

Yggdrasil Magical Academy First Year
Class: Battle Homunculus

A first year student at Yggdrasil Girls' Magical Academy, she enrolled into the academy to improve her magical combat skills. 

Her main weapon is a magic gun, and she can harness the power of the Philosopher's Bone to transform into a bodysuit that can be worn by anyone she wishes to protect. However, this skill has a side effect: it's highly arousing to the user! The close skin-to-skin contact causes her to be in a constant state of titillation—her breathing grows heavy, and it makes her heart race.

While she looks like a normal girl, she's a very serious student, and due to her shyness, she's often unable to resist the protagonist's forceful demands. Even when her magic power runs low, she'll continue her "training" with him in order to keep her arousal in check.