Credits for voice actors in Dicey Dungeons look very general, without specific people attributed to specific characters.
So, do you have any details written down, for instance who exactly voiced Jester - and if it was one VA specifically or a mix of several people for this one char?
To be honest, I'm not really the best person to ask - the voice acting in Dicey Dungeons was something Niamh did independently, and kinda just delivered fairly last minute. (I was a bit nervous, but it turned out amazingly!)
The Jester is voiced by Niilo Takalainen, who also worked with Niamh to mix all the voices for the game. Quite a lot of the Jester lines are playful imitations of Adriana's amazing Lady Luck lines - e.g.
(Niamh is the person to ask for more details than that, I'd probably just get things wrong!)