How should I describe my characters personality?

You can do minor additons throughout the story of her likes and dislikes, etc. Maybe have a scene where Alicia and Jane are having breakfast and Jane asks Alicia about some of her favorites. This could be a way to get some of that info across. You've already got some physical description in there, so that's good. You can also maybe have a shopping trip she goes on where she hears her fave song or goes out for her fave dinner. Something. Maybe some info can be disclosed when she becomes friends with the Brook and Clark siblings. There are ways to add it in without it being an overload of info. :-)