[He doesn't for a moment miss the voices -- small as this place is, thoughts are usually painfully unguarded -- and he's actually been appreciating that relative quietness. Once it's clear that there's a pattern to this -- that it's a swap and not a loss sort of thing, he's maybe been an asshole only put forth minimal interest in figuring out who ended up saddled with his powers. (And he was rewarded for this laziness by getting a few dark konpeito.)
Still, once he actually focuses, it isn't too difficult to narrow down who got his powers and so he's finally hunting Victor down. If they're supposed to ~work together~ he might as well get on that! ......... and maybe he feels a little guilty for delaying.