Well the idea is pretty basic: when someone with this ability makes direct physical contact with someone (specifically skin making contact with skin), the most recent memory/emotion is transferred. But whose memory gets transferred depends on who initiated the contact.
I have an idea of how it scales up, with lower tiers transferring emotions that last for a little bit, and higher tiers of the skill making whoever is touched feel that emotion or memory for longer, and at Rank 5 (hypothetical in this case), the target relives a memory, including emotions and pain.
Excuse me Crimmy but is your persona roleplay still open? I see it's fairly well in and most of the arcana have been taken however due to a lack of new roleplays being really interesting to me personally I figured I'd see if yours was open.
High Priestess, Chariot and and Moon are available, so feel free to join.
However, I'm not sure what @Melpaws is going for, given their interest, so before you pick a Arcana it might be better to ask her to see you guys aren't doing the same one.