Luka Urushibara

漆原るか, Lukako, Ruka, Rukako, Ruka-meow, Lab Member 006, Warrior

Age: 16 Birthday: 30 Aug Bloodtype: A Height: 161 cm Weight: 44 kg 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. Thanks to that, he thinks all the ridiculous stuff Rintarou talks about is that of reality. Rintarou makes him out to be his student on his own, and is currently in the middle of brainwashing him. A very shy person, he often turns down Mayuri's requests to cosplay. (Source:

In Episode 8, he succeeded in changing his sex to female by sending a message to his mother's pager, telling her to consume more vegetables to alter his sex.

In exchange of dating Rintarou, Luka undid his message which turned back his sex to male again.