I like how Fate has the " Lay just one finger on her and I'll kill you" look, while Nanoha's being Nanoha. Also, one of the tags on pixiv reads "married lesbian couple"
^^^That corny dead fox looking thing? She's had it for a long time, might have gotten it already back during first year when she was still prone to picking up bizarre affectations in her tragically misguided attempts to become popular. Idr really though, would need to reread the old chapters to check.
Be that as it may she's clearly rather fond of the silly thing.
^^Certainly not by sitting on their hands. As things stand Asuka's essentially winning by default since she's the only one proactively and obviously making moves on Tomoko (who's prone to turning into a gibbering pile of cheese near her even without the blatant flirting).
Step up yer game, girls.