Second year in Kasensou Private Prepatory Academy. Mayuri's classmate. Has the personality of a polite, well-groomed and justified kind of beautiful girl (though a guy). Uses honorifics specifically with Rintarou. Doesn't push his opinions much upon others, but when he does he's quite bashful and blushes quite a bit. Because he's quite serious by nature, he simply believes what others say.

She is Princess Ecarlate's maid and guardian who also happens to be transgender. Though she may look helpless, she is actually a capable fighter and a superb gunslinger and marksman.