Billy and Albert grew up together in Seattle, Hillcrest (in this, I pretend it's an absolute slum, idk if it ever was or is, pls don't take it personally if you live there)
Albert's mom was a really sweet woman, and loved when Al had Billy over. She could see how much he cared about Billy. Albert's father was an absolute pos tho.
Albert has a twin sister (my oc). Albert is named after his father, while his sister. Allison, is named after his mom. He has a younger sister names Vincent
Both Billy's parents weren't very nice to him. His mom was nice enough, bit with everything going on she still somewhat neglected him. She always knew where to find him, but when Billy went to Al's house neither her nor his father noticed.
Billy was locked out of the house once while he was 13 because he was 2 seconds past his 9:30 curfew, so he went for a walk. He was mugged and stabbed by an old man, and is missing his left eye because of it. He was able to get a fake one a few years later thanks to Albert and his stealing habits.
Albert badly injured his right arm while they were playing in the field, and now he has trouble with it. Sometimes he can't feel it at all, other times there's a constant sharp pain all the way through it, but he is still able to defend himself from the zombies.
Hip problems run in Albert's family from his moms side
Billy made an underground clubhouse for him, Albert, and their friend Erin (yes I mean Battery from bo4)
They're both gay, but Billy isn't open about it right away.
Billy finds himself staring whenever Albert isn't wearing his coat. He likes to admire the hourglass shape in his waist that's only ever visible when Al untucks his shirt.
Albert has body image issues, so he really doesn't mind when Billy stares hungrily
Due to... "past experiences" albert was granted permission to shower separately from the other prisoners. So they allow him to shower with Billy, since Billy isn't allowed to shower with the rest due to his mental issues
Billy tried to hide his feelings for Albert by being an asshole to him, essentially breaking their friendship, but he fails and eventually does break and talk to Albert about it. Albert forgives him and they end up together
They do, at some point, tell the others about this. Sal doesn't understand at first due to Billy's odd wording, but once he realizes it he chuckles and hugs Billy. "Don't kill him" is all he says, and he smiles at Albert for the first time
When they realize Albert needs to kill them to end the cycle, Billy talks Finn and Sal into trusting him.
They kiss as Albert shoots Billy twice in the stomach
Probably more that I'm forgetting but I'm dumb as shit