Michelle has been captured, and despite telling her Captor everything, he ruthlessly beats her to death and then continues beating her dead body just for the fun of it.
Michelle never cries out. Maybe she does some light moaning/groaning until she is knocked out and killed. She only begs once.
The POV Killer is mostly quiet, maybe some light grunting, but nothing loud or over the top.
Some time later, Michelle’s Twin Sister challenges POV to a fight, seeking revenge for her sister. What follows is a POV style one-sided beatdown as Michelle (Twin) is knocked down over and over, becoming a helpless ragdoll and punching bag. POV then beats her to death and continues to beat her dead body, similar to the way he did her sister.
Michelle never cries out or begs during this part. Maybe she does some light moaning/groaning until she is knocked out and killed.
The POV Killer, again, is mostly quiet, maybe some light grunting, but nothing loud or over the top.
See also:
Silent Endgame. Episode 1
Michelle the Willing Victim
Clash of Fists 2
Clash of Fists
Clash of Fists. Hardcore remake (scarlet paint, no sound effects, no music background)