Note: She has not even dated them once. Nor has the top event happened. She is lying through her fangs.
I've had the idea for a while of Calcula and Hanna having a rivalry; Hanna hates everyone meanwhile Calcula tries to piss everyone off, so naturally those merge together and mean she tries to piss Hanna off. And it seems mentioning Nameless around her is a surefire way to start aggravating her.
Hanna does care about Nameless...to a small extent. She still wants them dead (and they annoy her very frequently) but since she obviously cannot achieve that, appreciates the fact they're like, the only one nice to her (although she'd never mention it). So naturally the idea to her of this Winged Thing coming in and swooping them off their feet kinda leaves her a bit...let's just say upset.
Does Calcula have a crush on Nameless? She probably says she does at times, but how much of that is genuine and how much of that is her trying to piss off Hanna is up for debate. All I know is if Nameless learned someone had a crush on them they'd probably get really really blushy. She might be in love with Hanna a bit too. Nobody's really sure. Again, intentional master of the mixed messages. Nobody can tell, Poe's Law.

Sorry for the long lore dump LOL, sometimes it's fun to just type up whatever about my characters.