(You auctioned a demon girl for 10,000$ she looked a bit upset but it was her duty to listen to you, it was a device thing inside her body so when she disobeyed her master it would hurt her and that pain she hated)

..m-master um.. M-my name is Rena.. If you don't mind me telling...

she was nervous and she knew she was gonna have to follow every order from her master..