Does James Sie have a background in combat or martial arts like some of his characters?
Yes, he's a black belt
No, he's primarily a voice actor
Not sure
He used to be a professional boxer
Answer
No, James Sie primarily acts as a voice actor rather than a live-action actor specializing in combat-heavy roles. While some of his voice characters might be associated with combat or martial arts, he does not personally possess such a background in reality.
The Wonderful World of James Sie: An Engaging English Quiz