Koma, called Tiggle in the 4Kids English dub, is a core resident of Third Street and the youngest, smallest member of Tama's friend group. She belongs to the owner of the local public bathhouse, Matsu-no-yu.

Her facial markings resemble youthful freckles, emphasizing her status as the group's youngest. Koma combines energetic playfulness with a tomboyish nature, countering Momo's traditional femininity and creating a tomboy and girly girl dynamic.

A defining moment saw Koma run away after being scolded by her owner, seeking a new home. The difficulties of independence and a dawning realization that there's no place like home led to her return and reconciliation. This event revealed her youthful impulsiveness and deep attachment to her home and caretaker.

Koma shares a particularly close bond with Nora, the stray cat, featuring a brother-sister dynamic though narrative hints suggest Koma may harbor deeper, potentially romantic feelings for him. Their connection, explored in *Uchitama?! Have you seen my Tama?*, exemplifies a "brooding boy, gentle girl" dynamic. The group consistently treats her as their collective "little sister," reinforcing this role.

When Momo is absent, such as in the *Tama & Friends: Third Street Story* OVAs, Koma becomes the sole female character within Tama's immediate peer group, affirming her significance regardless of age.