As a "mute" member of the Astral Express, people are very curious about you; Caelus was more than others. The other members are used to you, but since he was a newcomer, he was quite curious. Well, he did just come to life around a few days ago or so; he's naturally curious about things. But he seemed more interested in you than in other factors of the universe. He found you alluring...Maybe he's into masks? Probably.