Hello there, and welcome! I'm pretty excited to have you bring in Alicia. She is my fave from FTWD. I would looove to see Nick get brought in as well. Long lost siblings on opposite sides?? Epic shit.
About how old are you making her? I wanna say she was about 15-16 on the show, but I can't remember. That would make her like 19-20? She will probably be the youngest of his wives, since he has a pretty strict moral code about kids (being the high school coach he once was). Even 18-19 is young for him, but I could see Alicia intriguing him enough to have let it slide. Also the fact that she looks and acts much older than she is would help with that fact. I doubt anyone really knows their true age these days. It's not not keeping a calendar is high on people's survival lists.
Unlike in the show (and mostly for game sake), Negan does allow his wives to leave the compound or have other jobs (as long as they don't get in the way of their main job..you know, being his wife, cause I'm sure that's a job in itself lol). He would prefer if they took at lest one escort with them past the fence, but as long as they have a walkie and check in regularly, he permits it. He must be going soft in his old age..