狗谷 志郎

3rd year high school student.

Shirou Kutani is a class clown and lone wolf of the Guardians. He lives with his fraternal twin sister Rikakowho works with Saya's guardian Honami. Shirou is the nephew of Ryou Kutani. Shirou is one of the most cheerful of the Guardians, and can usually be found making jokes with Rei and making people smile. He can be quick to anger but despite his temper and his tendency to be laid back when he isn't concerned, he is also very friendly and loyal. Shirou desperately wants to be accepted as a Guardian for the Tamayori Princess however the Guardians make a deal with him that if he can prove his worth as a Guardian then he can officially join them. In Shirou's route in the game the protagonist learns that Shirou truly yearns to be accepted by others and wants to find somebody precious to protect.

Shirou is very hyperactive and childish despite his age he tends to astound Hibiki making him question how Shirou got so far into his education yet be so dumb. 
Wikia.