Possessing an encyclopedic knowledge of herbs and poisons, he allies with Dino Golzine to determine the chemical composition of Banana Fish. Yut-Lung possesses a deep grudge towards his brothers, who raped and murdered his concubine mother, and eventually violently deposes them. Yut-Lung is most of the time quiet and stoic. Although he presents himself usually politely and harmless, he is actually cold-hearted. The cruel death of his mother he witnessed at the age of six. He is 16 years old. 