Creature is a popular emote of a dog, particularly a Mexican Hairless Dog, aka. a Xoloitzcuintle. The original creature used for the popular emote (seen below) is owned by social media influencer Anet Veltman, who has uploaded numerous videos of creature on her Instagram and TikTok pages.

This emoticon was popularized in various twitch spaces, perhaps most prominently in the Artifact section.

Creature : https://7tv.app/emotes/01GZ95010000028EVQ0341T7QS

Creature is loved by many and has spawned various communities and spin-off emotes such as creatureConcerned.