Fiona Frost / Nightfall

Fiona Frost is one of the WISE agency's finest operatives, working under the codename Nightfall, though her heart belongs entirely to her handler and idol, Twilight. Sharp, composed, and formidable in a fight, she carries herself with cool professionalism on the job — undercut by a hopeless, jealous devotion whenever he's around.

The gap between her icy competence and her lovesick spiraling is the whole joke, and Ayane Sakura plays both halves without ever softening either one — the clipped, businesslike agent and the seething, muttering romantic are somehow the same person. It's a sharp bit of comic control that never tips into caricature.