Oh, not Zagerus? Then it has to be Thanatos, right? Assuming this whole 'brother being back' was to do with the train. And while it's nice to have it confirmed this was about the train, that part skipped in Idia's head for the moment with the mention of marriage. "A-ah, what? M-married?" Idia didn't even know they were dating.

WAIT! This is getting off track! "Where's Thanatos now?!" Focus, Hypnos! Thanatos has a level head! He could help Idia! ...right?

Please help him, Thanatos...