Haku migrated from Earth before the founders of Châtaigne did. He worked at Raine's shop in Gardenhome until he met with Bara and the others. He and Bara were actually acquainted in the Old City and quite friendly with one another, so Haku decided to join their efforts to build their own village.

A skilled clothier, he made his scarf and many of the garments worn by the not-cats of Châtaigne. His equipment and workstation are on the second level of the house he shares with Bara, built when they became partners and decided to raise a big family together.