Sora doesn't seem entirely sold on the idea. But... He wants to help Vanitas become a better person and part of that means offering to trust him.

Even though he won't turn his back on Vanitas just yet, he can at least admit that the small Unversed can look a little cute when they aren't terrorizing young children. And if the Unversed aren't going to attack, it might actually be a good way to find more people.

After a moment of thought, he clearly gives in. "All right. You got a point." Then, after a moment, "So, how does that work? Can you sense them right now? If they find someone, how will you know?"