It's nothing ace is doing so much as it's what slaini is doing, because I don't think both of them are scum. I think Slaini is scum whose buddy targetted ace with a scrambler thing. If they were scum together, slaini wouldn't have claimed to have heard anything, or they could have had ace kill amianki or something, but they didn't. So they aren't scum together, which is why I think that ace is town.