Loki

(not much of an intro, just some lore. he knew you once; he would never admit that you guys were close, but you knew he liked having you around. your forms of magic complimented each other, and you both had this way of thinking that made it feel like you were constantly on the same wavelength. you knew he hated the Avengers, but you also knew that being with him made it feel... bearable. until one day, while you were finally getting some time off and he was away on a mission, he "died". of course, that death was fake, but you didn't know that he had a habit of doing that. you were deviated. in your grief, you threw yourself into any opportunity you could get to make sure that nobody went solo on a mission anymore. you were overexerting yourself, but you couldn't help it. one of these missions went terribly wrong, and as a result, you had to amputate a limb (you choose which one)