Bucky/Jarvis, for the domesticity meme thing.
who cooks normally?: Jarvis, Bucky can't cook. Before becoming Winter Soldier, he never cooked, unless Steve was sick.
how often do they fight?: A moderate amount, probably a healthy amount for a couple.
what do they do when they’re away from each other?: Jarvis wants him, just in his entirety, and Bucky wants his back rubbed when he has his nightmares. (nope totally don't have a thing for Bucky needing his back rubbed because I need it but no one does it for me)
nicknames for each other?: Jar, babe and other general things for her, And Jarvis would probably call him Bucky Bear after hearing others call him that.
who is more likely to pay for dinner?: Bucky. For sure.
who steals the covers at night?: Jarvis. Bucky's always staying awake once the first nightmare hits, watching her in slight fear of her getting hurt. Or him hurting her.
what would they get each other for gifts?: Bucky gets her jewelry, and that's about all, because he's awkward with people still. It's early enough for them. She would get him knives, because not only do they make him feel like he can protect her more, but she also thinks they look cool and that makes him display them instead of keep them hidden.
who remembers things?: Jarvis, for obvious reasons.
what would they do if the other one was hurt?: Bucky would freak out a bit and work on fixing it, Jarvis would just roll her eyes and murmur, "Goddammit James" before beginning to help.
who kissed who first?: Bucky kissed her first, but on accident really, for the most part.
who made the first move?: No one knows. It was kind of confusing when they were transitioning to a couple.
who started the relationship?: Same as the previous, no one knows.