[The answer that Sebastian offers is only slightly different from the reason Liem had been assuming. He knows, of course, that demons tend to be most powerful in their natural forms, so he'd been imagining that any shape one might choose to adopt would be chosen primarily for the sake of blending in—but he also has to acknowledge that with that in mind, there are few forms more convenient to adopt in most cases than a human one.]

Your last master was a child?

[Liem frowns, ill liking the idea of any boy who would be desperate enough or depraved enough to summon a demon into his service. But like everyone they'd known from their old homes, he must surely be dead and gone now. But then, he wonders,]

How did people summon demons in your old world, if they weren't thought to be real?