Bowloftrix is a druid, assistant to Pikkupstix, located in Taverley, that is involved in the quest Wolf Whistle. During the quest, he was kidnapped by trolls who wanted to eat him so that they would be ready for an invasion. He is rescued by summoning a Giant wolpertinger to scare the trolls away. He is then seen shortly afterwards in a cutscene with Scalectrix.
Bowloftrix's description of himself
His name is a play on the words "bowl of tricks" or "bowl of Trix" referencing Trix cereal, which has a rabbit as a mascot, fitting in with the wolpertinger theme.