Don't worry, he's genre savvy. No one has normal hair in anime, especially not magical girl anime. He'll just. Go with the flow.

"Oh, no, you didn't scare me at all!" César laughs a bit. "More like destroyed the half-dozen hypotheses for how our captors could be doing everything. My brother's the closest thing we have to a magical, ah, boy back home—" César really hopes Rex doesn't show up now, because he might legitimately kill him "—and I've seen the concept in... popular media back home."

He pauses for a moment, then has to rub his goatee in thought. "Rex might actually count, come to think of it...."