[There's the lightest flicker of a smile, just a quick twitch of the lips, at the mention that Doppio will remind Diavolo of who he is. There's no guarantee that Doppio will be around in this place as long as is needed, but Steven hopes he will be. The notion of having someone there to keep you grounded... It's nice. Better than Steven's own tactic of writing everything important to him down in journals.]

It's... fine if you interfere. I just don't want it to come at the cost of your life, is all. That's just a bloody waste, innit? But if it turns out you can talk some sense into them- [His hand moves gingerly to his chest, fingers lingering above his heart.] Or you're powerful enough to keep them from causing harm... Then yeah. Go for it. Whatever it takes.

[And he does mean whatever it takes.]