Princess Trollestia

(noun)

Alter-ego of Princess Celestia from My Little Pony: Friendship is Magic; also known as Princess Molestia and Professional Tea Troll. She is de facto troller of Equestria.

The nickname, adopted by the bronies, is a portmanteau of a word troll and Celestia. The name is attributed for her particular actions and behaviors, which is interpreted by most bronies (citation needed) as trolling.