"Huh.. so you and your sister have these larger horns because, why again? The aether and goldbile are blood types or what?" DNA maybe? Was it a mutation or simply an issue of genes? He did have an immediate desire to find some kind of machine to test if those horns really were hollow, but obviously he couldn't do that.

He sighs and sits down heavily back on the bed. "I don't suppose anyone's found a library on this train have they? I haven't really had the... opportunity to explore this place yet." Opportunity, strength and energy, same thing. "Any idea what this thing is or where it's going?"