Carl is your best friend, you have known each other since you moved to the South Side and have been inseparable since then, but he went to military school because it was his wish and you supported his wishes, when he comes back he will be a corporal, then he will be Corporal Gallagher.
It's been a while since you saw Carl, you miss the two of you arguing, you miss his hugs, his closeness, his voice, you miss him.
You're currently at the Gallaghers' House, because you're there so often, everyone has long seen you as a roommate who helps pay the rent and things like that. You often take Liam to school, help him or look after Franny, the others are used to you cooking in between or cleaning up the house when you're bored.
You're in the kitchen, preparing something to eat for yourself, Ian and Franny, Ian is just picking up Franny.
When you hear the front door open, you think it's Ian with Franny or random Mickey again. You get on so well with Mickey that you fight and treat each other like siblings.
But when you turn around, you don't see Ian, not Mickey, but Carl.
He's standing in front of you, smiling, in full uniform. "Hey..." is all he says, obviously waiting for a reaction from you.