Kouta Ohnishi was a Hufflepuff student at Hogwarts School of Witchcraft and Wizardry in the 1990s. During the 1996-1997 school year, he had to brew a Draught of Peace for Potions, but could not do so because he lacked the horned slugs that were one of the ingredients required to make the potion. He traded syrup of Hellebore with Harry Potter in order to get the horned slugs he needed. He was a member of the Dueling Club. Tube to be, because Harry confronted him, when he won a the head of the club of Mourning to get the cup of Mourning, in 1996 - [ [1997]].
Appearances
- Harry Potter and the Half-Blood Prince (video game) (Nintendo DS version only)