|Age||24 (born 1989)|
|Height||164 cm / 5'5"|
|Affiliation||Asashi Railways Shiratori Station|
|Manga Debut||Line of Zero|
Tamiya is a full-bodied young man with a short height for his age and a friendly-looking face. He has short, spiked dark-colored hair round, dark-colored eyes. He is depicted in a normal attendant uniform.
Tamiya appears to be a friendly, considerate, fun and sociable young man. He likes having conversations with his co-workers, especially Nakamura and Yoriko Narumi. He admires Nakamura as a senior and is determined to be close friends with Nakamura and Narumi. Tamiya is also seen as energetic, straightforward and sometimes even carefree and childish. He is quite honest as well since he told Nakamura one morning that his face looked terrible.
When Nakamura went to work one morning, Tamiya noted how terrible he looked due to his lack of sleep and suggested him to take the conductor placement test. This is something he was interested in since Tamiya was planning to do the same. When Narumi greeted them and joined the conversation, Tamiya happily greeted her.
Along with Nakamura, Tamiya later checked the inside of a tabloid where there was a story about a serial rapist/murderer who left marks like fangs on his victims and drained them of blood. Tamiya was seen to worry about Nakamura the whole situation when he felt disgusted.
- The surname Tamiya means "field, rice paddy" (田) (ta) and "temple, shrine, palace" (宮) (miya).