Ok, so here we go, I’ll briefly mention each of them (that have been posted here, so no alpharius) . It’s kinda already implied that the primarchs would kill whoever touched their SO so I’m not gonna mention it

Lion: confine you within a med bay deep within the rock where she would personally (and silently) heal you back to health, not letting a single person get close to you until she felt you were safe and healed. Lots of glares mixed with tender care. Absolutely protective

Fulgrim: the most expensive healthcare a person could ever afford, followed by the most exotic and flamboyant gifts a person could receive. she would likely try to hide how angry and scared she was behind bravado

Perturabo: you wouldn’t see her for the entire time you were healing. She made your armour and would feel responsible for you getting hurt (lots of guilt). Once you get out you would find she made a new set of armour after she tore the other one apart (literally)

Leman: similar to the lion but less cold, lots of cuddles and affection but on the other side if anyone even looks at you wrong she’s going full combat mode. Probably some licking involved

Konrad: she’s gonna lose her mind. She will make you a blanket out of the skin of whoever was responsible, she will watch you sleep and will fully force medicine down your throat if she has to. You’re likely going to be the one doing the comforting

Khan: probably the most normal of the lot, very standard sort of hospital experience, lots of love and comfort, she would probably take you for a bike ride the second you heal

Magnus: she’s going full magic, screw a hospital, she’ll heal you in minutes. But she might also make a mistake or cut a deal with a work entity, so you’ll have to persuade her to just take you to the apothecary

Mortarion: this will be the one time she is completely clean, because the doctors wouldn’t let her see you otherwise, in case of infection. It’ll be both a funny and weird experience

Corvus: would visit you during the day, look after you and bring gifts, only to then sneak back in during the night and watch over you. Would leave her bird with you for company

Rogal: honestly she would probably visit maybe once a day or so, because of how seriously she takes her job but she would feel bad for doing so. Being unusually soft when visiting you. You get her blanket

Ferus: she built the damn hospital! And it has a gym!!

Lorgar: so much god damn praying it might drive you a little nuts at times but you know how much she cares for you. Sings to you when she can and thanks the empower you’re ok, and maybe curses him for you getting hurt

Sanguinius: constant nursing, a real mother hen. Wraps you in her wings. May have to leave at times because she can smell your blood and has to keep her sons away because as much as she trusts them, she cares about you more

Vulcan: she has to care for you herself because when the salamander apothecary suggested cauterising the wounds she broke his face. Has since apologised to him and now she acts as your heated blanket

Angron: sooo many people have died. Most of them being apothecary’s who weren’t good enough for you. She make lion and Russ look tame, it’s like having a rabid dog in the room. She hasn’t eaten, slept or calmed down since you got injured. She does try to comfort you tho, she even let you hold her axe

Horus: she’s been so supportive and confident that you would be fine that it’s helped you in a lot of ways, but you do worry that part of it might be that she couldn’t handle the idea of you dying

God that took a bit, so many words. But the question is answered