Anybody know which person knows about tricksters? I have done the report on Leprechauns and did the general study. Been driving me crazy.

Well you only need one report - so you've got all you need.

However, if you really want to find a person who knows about Tricksters - to get a more "exotic" Trickster - you'll need to find someone who hails from a more remote locale. Don't do it on an empty stomach. ;)