It’s easier than you might think.
You write fairly and without bias because you are so totally determined to not be unfair that in most cases you’ll go the other way and make that character better than he/she really is.
And you make that character compelling because to you, he/she is already compelling, in your mind, at least. Maybe not in a good way, but very, very compelling.
Which is probably why you are considering him/her as a character for your story.
