Cho Hakkai is one of the main protagonists in the anime and manga series 'Saiyuki.' Calm, polite, and intelligent, Hakkai is the group's healer and a formidable fighter. Originally a human named Cho Gonou, he transformed into a youkai after a tragic event. Traveling alongside Genjo Sanzo, Sha Gojyo, and Son Goku, Hakkai provides guidance and emotional support, balancing his gentle demeanor with an underlying strength. His complex past and loyalty make him a vital member of the Sanzo party.