They do need that power, and that's why Yuya thinks it's selfish for him to not take it. He's less concerned about his appearance, though his gaze flickers to Lambert's tail when he looks back as well.

"You really want forever with him, right?" Yuya brings his gaze back up. Yuya's pretty sure that's what he wants too, he doesn't know why he feels so uncertain about the choice he should make.