If you are looking for a community perspective or deeper analysis of this specific scene, many fans on the Classroom of the Elite Reddit discuss how Ayanokōji's deadpan nature during these intense moments is what makes the character so terrifyingly effective.
The "true" antagonist and someone from Ayanokōji's past begins to move more overtly.
The climax of this episode is widely considered one of the most significant turning points in the series, cementing Ayanokōji’s status as a "monster" of calculation.