Hi sunseenli! Nice to meet you too, thanks for the greeting.
A gender illusionist is someone who puts an insane amount of effort into looking like a woman for the purpose of entertaining others. It's a lot like being a drag queen, only the makeup and costumes are a little less flamboyant and extraordinary. It's a lot of fun, and the makeup and costume skills I've picked up from it have really helped me improve my cosplays.
How kind of you to ask! You can refer to me however you'd like. Sometimes I legitimately feel like either a boy or a girl, so I answer to both.