Senku was mostly listening to the psychic chatter, trying to pinpoint it and that dangerous presence was strong.

He wasn't the best at talking out his plans, he attempted to follow that thread and probed back mentally. Was it familiar? Had he met this psychic pokemon during his visit?

Instead of guarding further, he tried to relax, open and willing for the creature in question to probe him further if he wanted to get more of a sense of him. As a result the others might feel it as well. Slow and steady, his breathing is even and relaxed. He is not afraid, although he probably should be.

Did we meet? Eva and I are family. We're not a threat to her. Senku offered, even though Leia volunteered to negotiate. He wouldn't go so far as to negotiate, that was not in his skillset, but a potential gentle reminder was not beyond him.