He is the older brother of Jun Wong and the oldest son of May Wong. His dragon is a Deadly Spinner named Webmaster. He is the fifth person to join the Dragon Club as its Strategy Expert.
Eugene is a young adult of Chinese descent. He has brown eyes and short black hair styled in a flattop. He wears a red shirt, blue jeans pants, a black jacket and black boots, He also wears small black earrings. With his jacket unzipped, we see he has a pendant underneath.
In " Alex Not Found ", he briefly wears red swim trunks. Prior joining the Dragon Club, when he was in the presence of adults, especially his mother May, Eugene presented himself as kind and polite young man, as well an adoring older brother towards his sister, Jun. In actuality, Eugene embodied many of the traits of the stereotypical teenage trouble maker: being extremely immature, selfish, arrogant, and pleasure-seeking. He was easily bored, and craved excitement, which usually came in the form of performing pranks or picking on others.
He was also very lazy, having an intense dislike of having to do chores and preferred having Jun do them for him. He was also a rude, and somewhat, abrasive older brother, who enjoyed teasing Jun at almost every opportunity. It has been implied during their youth, Eugene would often pick on her and her friends, which caused the two to have a strained relationship over the years. This included Tom Kullersen, who noted upon their reunion that Eugene remained as immature and obnoxious as he was during childhood.
He was also highly intrusive, and liked to get involved in other kids' business when it doesn't concern him. This is especially the case upon hearing about the existence of Dragon Club, which he attempted to uncover the truth about and eventually expose their mission after first learning about the existence of the dragons.
