Dimly, Gongenzaka overhears Rita and Yuuya- and then Ignatius- through Peridot's ears- he weakly continues to urge the gem on, uncertain if he can manage to communicate to the others and stay with Peridot at the same time.

Best not to risk it. But, she refocuses, and so he immediately begins to guide again. "I, the man Gongenzaka, believe Ignatius has made an opening! We must go through it, and move from there- make certain Syrlya's iron is in your range to pull with you! I cannot see that opening it until you do however, so keep this in mind!"

Fortunately when she does, he'll catch it even if the sight doesn't register with her. Backseat videogamer effect; the one not focused on moving and surviving catches more of what's seen.

(Hopefully she explains what's going on later, though, because he bets that Yuuya and Rita are baffled.)

Once Peridot's eyes move over the Mother's front- that will be when he hones in on the hole and shouts to move.