[Happy that she's coming with him, Childe crosses the water over to the other shore where the cave resides, walking up towards it cautiously, noting the metal grating that's been opened.]

Looks like this has been recently opened. Perhaps as part of your exploration of the area?

[Even though it seems like he's ignoring her warnings, he's really not- the man is on edge even through his relaxed exterior. Someone watching them can't go uninvestigated however, so leaving and letting it go just isn't in the cards. There's a lot of Fatui here, and even if they're not his direct subordinates, he won't let them get eaten alive by anything else that could be lurking down here. Unlike other Harbingers, he'll actually take care of their troops properly, at least when it comes to things like this.

Plus, there's always that added excitement if they get to fight something strong. That's probably more of the reason why he wants to explore.]

It looks like an ordinary cave, and maybe there was something inside of it once...but why the added security? There was three locks on it.

[He looks at her, his eyes asking- know anything about this?]