Finnuala O'Thugg

Finnuala O'Thugg is a female leprechaun seen dancing in the opening theme.

She meets Dez in the episode Does This Please the Jigmaster? where she is the eponymous Jigmaster. It is at this time she introduces herself and her father Malachy by their full names, and then their surnames don't get referenced again.

Vanilla is a word that her name resembles, as it is displayed in YouTube's automatic closed captions when a Little Clovers member says it in Team Shazamrock

Finny is a nickname that Dez mocks her with.