Rui is a 5'11 male born on June 24th (Cancer), and is presumably around 17-18 years old. He is in his 2nd year (2-B) at Kamiyama Highschool. Rui has thin, yellow eyes with red eyeliner. He has choppy purple hair with two cyan streaks, one in the front and one on the left. His right ear is pierced with a cyan earring. Rui's school uniform is a pinkish-white button up with a loosely tied red and blue striped tie. He wears a gray cardigan over this, with his sleeves rolled up to his elbows.