Liz Katz Nude Harry Potter Cosplay Onlyfans Set Leaked. Liz Katz (aka Risi Simms) is an American model and cosplayer. She first had a brief career as a porn star in the adult film industry under the pseudonym Risi Simms. She won IGN’s Best Cosplay award at WonderCon 2012, and began cosplaying professionally. She was ranked in “sexiest cosplayer” lists by Playboy and FHM Magazine, and has run a Twitch account since 2014. See more of her here.