Haku

i like haku because of his meaning as not to some random opponent you can kill and go- you feel he has wishes, desires, dreams, that's how you know that's a good character if you can feel they are people and not some random villains you can kill and go.

second, his gentle and kind personality. i don't know if that's your cup of tea or not, but his personality is amazing to me.

his backstory was rich, layered, complex and overall good. and his relationship with zabuza was also really complex.

overall amazing well-written character.