Shuffle Alliance empathy magic

Okay guys, any idea on how we want to tackle this?

We know that the crests can be passed on (and it doesn't necessarily mean the previous Shuffles have to die in order for that to happen; it just seems that their life forces can save their successors in the event that it needs to happen) and successors can be named.

Generally there seems to have to be a connecting stable empathy bond between the members that forms prior to their receiving the crests.

And there's been talk that the nextgen Shuffles are:

King of Hearts - Niran
Queen of Spades - Mary
Jack of Diamonds - Rowan
Ace of Clubs - Nathanael
Black Joker - Yuliya

Correct me if I'm wrong on any of that?

And I just wanted to see if we all wanted to kind of iron out how we headcanon the Shuffle Alliance magic in general to work.