Kokin-chan, alternatively called Coreen in certain dubs, is a female alien-germ hybrid with a vivid blue complexion, a red bow adorning her antenna, and a white face accented by green eyes, a pink nose, and round rosy cheeks. She sports teal boots and a petite tail. Her signature ability involves weaponizing glowing blue tears that force anyone struck by them to weep uncontrollably, rendering targets helpless.

First appearing in the 2006 animated short *Kokin-chan and the Blue Tears*, she descends to Earth inside a transport egg, unleashing tear-induced chaos on friend and foe until her elder sister Dokeen halts her rampage. Within the broader *Sore Ike! Anpanman* continuity, her origin evolves: her egg collides with Baikinman mid-attack on Anpanman, prompting the villain to gift her a custom UFO.

Brash and domineering, Kokin-chan frequently ignores others’ emotions, clashing fiercely with Dokeen in a rivalry fueled by jealousy over Shokupanman’s attention. Though their dynamic skews competitive, merchandise occasionally portrays them collaborating.

The 2019 film *Kirameke! Ice no Kuni no Vanilla-hime* sees her joining Anpanman and Princess Vanilla on a quest through a frozen dessert kingdom. While assisting the princess in solving an ice cream-making crisis, she inadvertently enables Baikinman’s assault on the realm during Vanilla’s absence—showcasing her dual capacity as disruptor and situational ally.

Her hybrid biology grants access to an underdeveloped devil form, though specifics are scarce. Across adaptations, her essence persists: tear-based manipulation, contentious sibling dynamics, and shifting loyalties anchor her role, with subtle backstory alterations reflecting narrative context.