Tidus could speak up, tell her about the people who do know where the entity is. But for the knowledge he is, he doesn't feel the urge to speak it. Everything she's said - she doesn't know this foe like they do, and those who're going up to them, those are people he has reason to trust more.

He doesn't want this girl getting hurt, and whether or not she picks up on anything from him, he speaks up about the point she makes to him, expression thoughtful. "I don't know how safe they are. It's like they make you think you're doing stuff in them, but you're not? I think the people who checked around might be around here-" he nods his head, meaning the café itself because let's just pretend multiple people are here at once. "So we can ask. But you-"

Tidus looks at Loki now, with his brow dipped in that peering way.

"Didn't you two get caught blowing up a park?" ...actually. He looks back at Sunset. "What was that about?"

The point he wanted to make - about a problem with them being the pair to infiltrate the D-Force - is put aside for that confusion.