[quote=Crazy Guy]
Could be fun, though Vael revealing him/herself (and the implication that there are two) in the backstory could get in the way, as that has already occurred, and Metanoia's whole shtick is knowing the past. And then bothering people with it. Though the two playing pranks on Metanoia concerning who's who could possibly happen anyway.
[/quote]

They were pranksters in their youth. 

I'd call this their middle age. Late 20s, maybe? lol

My suggestion is more, Metanoia meeting the other twin happens under less than ideal conditions; not so much that the other twin wouldn't immediately say, "Uh, yeah...I'm the other one."