Catrina is a Humanoid Feline Witch. Catrina herself is a powerful witch who is dependent upon the Witchweed potion, which is the source of her power. She holds the Bushwoolies her slaves and forces them to make the potion for her. After the Bushwoolies escaped, she then planned on kidnapping the ponies to be her new slaves, but she ends up kidnapping Baby Moondancer along with the Rainbow of Light to convince the Bushwoolies to go back for her. She was defeated by Rep and later redeemed herself of her bad ways by destroying the machine that produces the Witchweed Potion.

Her name is sometimes spelled with a "K".