What is it with MC? Is he a robot or cyborg?
There is no way any muscle group in his arm, that high up, can leverage him parrying a direct hit,
to the point it deflects it. Looks like the opponent is slashing, which means she is directly leveraging her whole right hand, throwing it behind her slash, while MC is not putting anything behind his defensive maneuver.
Talothral, MC looks to hold a long sword with only one hand, way up and almost over his own head and totally over the head of the opponent who is even smaller up straight than MC. What is MC even trying to hit? Shani flying around above him?
That is some weird technique of getting yourself wounded from simple sparring.