Thread: putting different temperments together

Already have a MC mix (guessing about 75% coon; he's 37" and 18lbs) that's 9 years old, really friendly, nearly paternal with other cats. My fiance and I were looking at getting a kitten, but while visiting the local shelter found a 4 year old female MC mix that my fiance immediately fell in love with, but she was a stray. She's sorta friendly, but is very quiet and shy around other cats. I know this is how my current kitty was when I first got him too, and thinking she'd grow out of it. Would the two be okay together, or should we wait for a kitten instead?