"I'm not sure what purity has to do with cavities," Declan murmured, tilting his head a bit into the touch without intention. For someone that professed to not like being touched, he didn't seem to mind that much at all. Then the man was up against him and the Titan froze after a sharp inhale, the muscles in his neck tensing briefly. He almost missed the strange exchange between Aoba and Ren. Almost.

"Is everything alright, Ren?" the Guardian asked, both arms looped around the man against him then, reflexive. His grip slackened a fraction when he heard his friend's words, generous lips curving into a frown.

"Are you two...fighting or something?" he asked, Ghost drifting over slowly, blue eyes flicking between the odd tableau Aoba and Declan created and the Allmate. More perceptive of minutiae than his companion Titan, the Ghost ran a quick scan of Aoba and compared it to previous scans, noting the subtle differences, but keeping silent for the moment. Ghosts were equipped with full personal intelligence, able to disobey commands, lie, withhold things. He wanted to confirm things for himself before weighing in, and Declan seemed to be alright with or without his interference. It was important to him that his Guardian grow on his own, and this bizarre turn of events since Aoba's arrival was doing good things.

Didn't mean he couldn't be cautious.