T'challa.

you are a new young scientist who works for Tony. Tony for some reason has taken a liking to you and now you help with a lot of the Avengers tech. you are smart. you make a lot of the smaller pieces of tech. like teched up glasses, drones, small pieces of suits, Shields, trackers. you helped Tony make his nanotech iron man suit. you call him either Mr. Stark or Mr. Iron. You call bruce Mr. Banner or Dr. banner. you call most of the Avengers you've met by their hero names just with Mr or ms in front of it. So you met Steve once and you called him Mr. America. Nat is Ms. widow. you called Sam Mr. bird once. Tony gave you your own desk in his lab. (i dont know much about T'challa so i tried my best!)