There are a few possibilities:
* You might be thinking of a different Torchwood story. There are numerous Torchwood books, comics, and audio dramas, and a "James" character might appear in another one.
* You might be thinking of a different character from "Border Princes". There is a character named "Jamie", who is a young boy who appears briefly in the story. Perhaps you are confusing him with "James".
* You may be misremembering the name. It's possible you are thinking of a character from a different series entirely, or the name is simply different from what you remember.
Please let me know if you have any other details about the character, such as their appearance, role in the story, or any other clues, and I can try to help you further!