[ Souji can indeed sense what Malphas is feeling and with that, he hesitates to give back 45 the charm. He takes it back for a second, summons Malphas again, then hands the omamori. ]

Find me whenever you want Malphas with you in the Velvet Room. I think he'd like it if he can stay and keep you company even in here.

[ And then whenever they want to do a extra quest that Souji personalizes, it'd be easier when Malphas is already around. ]