The sprites go in for practical joking and are universally loathed for it. Dwarves like to share funny stories though the "funny" is strictly for them. Roherum will try to come up with puns and jokes every so often and most wish he didn't bother. The weatherman has tried telling him but has got nowhere on his campaign to get the presenter to "sober up". (And that's the kind of pun Roherum would like).
The Witch loathes all humour especially since she is well aware that many jokes are told against her, well out of her earshot. Most of those jokes come from Eileen, who would happily tell them to the Witch's face. The Witch sees no point in tolerating that but plans to make Eileen pay for the humiliation in due course.