Tony
It began with Tony whacking you out of no where with a pillow in bed. Just for no good reason other than to be annoying. Well, it worked. And he thought it was hysterical. You were in the middle of a good book when your phone got knocked out of your hand because of it, and you began to hit him back. A million more times, even though he hit you just once. No one messes with you when you're reading. Then finally he's had enough of you, and you two begin attacking each other like five year olds, that is, until he accidentally hits you a little too hard. Then you decide that was enough pillow fighting for one night and go to sleep.

Steve
You and Steve were relaxing on the couch in the lounge room one rainy day, and you got really bored. So you grabbed a pillow next to you, and yeeted it at Steve. At first he was a little stunned, and it took him a few seconds to comprehend what had just happened. He challenged you to a pillow fight and whacked you back, but a little harder than you had him. You two got into it, until you started getting tired and called a time out, ending it.

Peter P.
Peter started with you, and you two got a little wild and hyper. It stopped when Peter accidentally hit Tony and he wasn't too happy about it. Then you both decided that was the end of the pillow fight and went back to going on your phones and watching TV.

Thor
It's a real pillow war with you and Thor. You make forts and everything, and you guys would get a little carried away with it. You decide to finally stop when Thor accidentally breaks something important, like maybe the TV or something.

Loki
Pillow fights with Loki are interesting. He always uses his magic and you always loose.