Oh. They're splitting up. Some complicated emotions pass over his face before he quickly swallows them down. Of course he's here to keep his sister safe, so the call should be easy. If he were more confident in Wrath's assassination skills while he's still poisoned, he might have left him to it. But he's not and it's pretty clear that Allison is going to see it through to the end with Emilia, so it's really not as much of a choice as he's presenting.

The comment about debt makes him frown again, but eventually he looks between the three of them and sighs.

"Fine. I'll get you there." Or at least an approximation based on that vague location. He's low on energy, but he can still manage a couple of jumps. The sooner they get the blood, the sooner they can be done with this. He nods to Allison. "We meet back in an hour."