Yu Kirino.While travelling aboard Luna's carriage, Kunai disguises Luna as a schoolgirl so she won't draw attention. The two bounty hunters, swordwoman Mikan and cross-dressing mage Yukikaze, are in the area hunting sand wolves for their bounty, but the pack is too large and they flee. Kunai, who happened to be nearby, defeats the wolves for skill points then leaves. Kunai notices Aku's leg has healed badly, causing her to limp. He uses his skill points to summon one of his NPC aides, Yu Kirino, a doctor and scientist who, despite being a genius, has an unfortunate sadistic streak and a fetish for young boys...