Torajirou is a preteen boy with fair skin, wavy blonde hair long enough to tie back in a small ponytail, and bright green eyes. He has two small markings on each cheek reminiscent of a cat's whiskers, and a wide, cat-like mouth. He wears a black hat with a bright green bill and metal plating on the crown, red headphones, a brown vest over a black shirt with yellow highlights, green wristbands, yellow shorts, and green-and-white sneakers with dark green soles. He also wears red headphones around his neck and has large, colorful buttons on his clothing, a green one on the bottom of his vest and blue and red buttons on his shorts.
During winter, Torajirou wears his shorts and shoes with a cream coloured sweatshirt, a black and red jacket and black long johns.
Torajirou is a free-spirited boy who likes to go with the flow and believes in the importance of freedom and expressing one's emotions. Online, he is a famous App Tuber known by the nickname "Astra". The catchphrase he usually uses during his videos is "Do I feel it? Don't I? I totally do!" (ノレる? ノレない? 超ノレる！ Noreru? Nore nai? Chou noreru!?).
Torajirou's family are Grand Masters of a tea ceremony school, and are very strict and traditional.
His Apptter username is @astramu.
- Torajirou Asuka (飛鳥 虎次郎)
- Ja: Asuka (飛鳥?). Japanese surname that means "flying bird". Possibly after the Asuka period of Japan, and a likely reference to his family being very traditional.
- Ja: Torajirou (虎次郎?). A Japanese male name composed of the kanji for "tiger" (虎 tora?) and "next son" (次郎 jirou?). Possibly a reference to his cat-like face and the colors of his clothes.
- Astra (アストラ)
Nickname used in Digimon Universe: Appli Monsters.
- Ja: A combination of the first two kana letters of his surname and name, "Asu" (あす?) and "Tora" (とら?), as well as a reference to Astra.