Wanda: Mischief, cause you kept getting in trouble

Bucky: Sunshine, Bucky is actually a cinnamon roll 

Loki: Princess/Prince, he's still going to take over the planet

Thor: Lady/Lord, cause he IS Asgardian

Bruce: Apple, cause that's where he found you :3

Steve: Peach, cause you look like one 

Tony: Secretary, cause you're the boss here

Natasha: Hero/Braveheart

Clint: Basketcase, teasingly