Age: 17

Birthday: June 1

Astrological sign: Gemini

Height: 169 cm

Blood type: B

A joker who goes around asking for his schoolmates to share their lunch with him. Yashiro is soft-spoken but very charismatic. He is very friendly and well-liked. In addition, he is quite respectful towards anyone he meets, even robots. He is supposedly a normal high school student, until he suddenly finds himself being pursued by several factions - HOMRA, SCEPTER 4 and Kuroh Yatogami - who believe him to be the murderer of Tatara Totsuka, a member of HOMRA.

He is also somewhat laid-back and happy-go-lucky. Yashiro carries also a red, Japanese style parasol with him at all times.