He heard Minato's cry for help, and stopped himself in his flight from the elevator shaft. A hand snapped out and caught the edge of the doorway, to help halt his momentum. So they couldn't all make it out themselves. He hadn't even thought to question that the could, or worry that the others would make it or not.

Kain felt a brief bit of shame, but didn't dwell. There was no time for that. He paused to let Nesir pass and to assess the layout of the cables, sheathed the salvaged sword he carried, and then was right back in there, crawling along to where Minato hung.

"Here!" And once close enough, if there's enough time to get close enough, he'd offer a hand. If he were too busy clinging to be able to grasp it? He'd reach out and grasp instead.