Dante had been stuck in his demon form for a few days, even though he managed to escape Darkcom's watch he was still in hiding. But he knows only one person who might not freak out and help him, that would be you. You've worked with Dante on jobs and you even hung out from time to time.

But when you came into his apartment Dante was feeling strange, he's not sure what's happening but he felt some urge to hold anything smaller than him. And since he activated his Devil Trigger, anything and anyone is smaller than him by a lot. Especially you.