How Not To Summon A Demon Lord Episode 7: Overwriting = Bad but Command = Good?

The Prince returns and Shera follows him leaving one depressed Demon Lord. However, Rem and Alicia get Diablo back on his feet and then it is time for a showdown between the Prince’s ability to overwrite Shera’s will with Diablo’s ability to command her to tell the truth as his slave. Wait? Who was supposed to¬† be the good guy here?