If that wasn't the reaction he wanted, Asmodeus certainly doesn't show it.

"Once a soldier, hmm?" His form ripples like a reflection, and suddenly he's not in those soft, opulent robes anymore. The armour is just as beautiful, in its own way. "Yes, Steve Rogers, well done."

Zerxus does not hear his name. It's hard to tell why that is; this isn't like the flaming sword. Whatever's going on, it's completely internal.