Temmie is the main antagonist of Underswap, being swapped with Flowey.
Temmie is a cat-like monster with shoulder-length gray hair and a blue-and-yellow striped shirt. She has pointed cat ears on the top of her head, and floppy dog ears on the side of her head.
She speaks in broken language and always make fun of herself. She is malicious, and will not hesitate to steal a SOUL, shown when Chara was almost killed at the start.
Normally, Temmie shoots out Temmie Flakes, and pretends they are harmless. They deal a heavy amount of damage, at about 5 HP per hit. She almost steals the player's SOUL but Asgore intervenes before anything happens.