the leader of Harmonyclan. a natural leader figure herself, Harmonystar, then Harmonystripe, set off to form her own clan, hoping to gather cats from all walks of life and form a tight-knit, close group where everyone worked together. their differences should never hinder one another, and she makes sure every problem or conflict is diffused. Harmonystar is optimistic and headstrong, although she can be a little naive. despite being a clan leader, she speaks with and befriends all of her clanmates as equals, often never seen distancing herself from them.

Harmonystar appears to have a close relationship with Sleuthheart, helping him gain confidence in himself.