What is houkou in Naruto?

Answer 1

do you mean haku if so he is in the wave ark he first apears as a mist hunter nin who kills zabuza but later turns out he just helped him escape his seond aperance is in the woods near tazunas house and makes friends with naruto his final aperance is on the bridge and almost kills sasuke making naruto mad an uses kyubis chakra for the first time when zabuzas in danger he saves him by taking the raiki for him instead of it killing zabuza it killed him