Haku will always be a soft person at heart despite his ruthlessly killing skills. He's never wanted to harm people but he's deeply loyal to his master, Zabuza, who raised him from when he was young and who is an emotionless shinobi, though he secretly cares for Haku. He can be very kind and thoughtful to those he's not ordered to fight against, offering helpful advice and affection. His loyalty stems from a deep love for the people he keeps close to his heart for the few people he cares about.