Butterscotch makes the Tazmanian Devil from the Bugs Bunny cartoons look like an amateur!!! He even bites and scratches his veterinarian who is known in town as "the cat whisperer!"
Butterscotch would probably approach you. He's really pretty friendly, just don't keep trying to pet him if he starts pulling away from you.
I introduced my two cats slowly, over the course of about four days. They get along fine. They even became closer when I introduced the dog!!!
Now they all get along. The cats mostly ignore the dog. Popcorn likes him more than Butterscotch.