hope those two get along okay. Mystery wrasses tend to be quite aggressive towards other wrasses. you shouldn't have any issues with the female HI flame turning into a male. good luck bro.I plan to add a Mystery Wrasse, Powder Blue Tang, and a Female Flame Wrasse with the hope that it will turn male like my last two wrasse's. I would rather spend $80 for a female and watch it turn male then spend $150 for a male.