Hoshina has short black hair with a fringe. His eyes have especially long lashes.
Has a very serious personality sometimes it can become cold but deep down he is very affectionate and warm.
His older brothers Mitsuru and Seiya Hoshina are great soccer players as well, as they are respectively in the J-league and the top college scorer. They came to watch Takumi's match against Seiseki. 
- His special skill is soccer.
- His favorite thing is the cosmos but he doesn't have anything he dislikes in particular.
- His favorite saying is "Live as if you were to die tomorrow, learn as if you were to live forever" (Gandhi)