Giggles

Giggles is a chipmunk from Happy Tree Friends who is Cuddles's girlfriend. However, it is implied that she's been cheating on him for multiple other characters within the show. She is also best friends with a skunk named Petunia, even though she mostly just uses her. The biggest example of her annoyingness was the episode Every Litter Bit Hurts, where she was an environmentalist and Lumpy was a garbageman messing with the environment.