Jean-Jacques Leroy

Jean-Jacques is a 19-year-old Canadian figure skater. He is commonly referred to by most people as JJ, his initials.

He tends to run his mouth quite often, but is otherwise a very trustworthy person who consistently carries out any promises he makes. He is also very confident, almost to the point of arrogance. During his short program, he thinks about how he is the only person who can pull off a collaboration with a world-famous band, and how he is the king.

(Source: Yuri!!! On Ice Wikia)