[quote=@Joshua Tamashii]
<Snipped quote by Scarifar>

Worse comes to worse, it can just be Joshua and Michelle vs Amelia and Leander.
[/quote]

Both Vance's charas, Angelo and Maisy don't have opponents so far, so you shouldn't get into a situation where that happens.

EDIT: And Shiyu, Tsukiko, Ethel and Ignia don't have opponents yet.