Unlike Soldat's chatter, being psychically linked to Senku was like being psychically linked to a rock. Solid and stable, completely unwavering in that manner. Eva knew that sensation well. He wasn't normally swayed too much by emotion. He'd had more than enough time to calm down from his initial ire before he embarked on the trip to find Eva.

I can feel her. Senku responded, pushing that sensation forward. There are a lot of psychic using pokemon in her world, I'm not surprised we can feel them.

His link to Eva was likely to be an asset, but he was keeping his mind focused on her just as much as Kaiba was.