I don’t know if the site could do copyrighted characters like that. It depends. You kind of have to “trick it” to do elements like Daleks and space marines. I tried everything I could to get it to generate a likeness of Elvis Presley and it consistently refused to play along.
it (leonardo AI) mostly refused to do Jimi Hendriks too- came out with soem really weird renditions that looked nothign like him- a few were close though