The faces of the teachers and the various powerhouses changed slightly. Because, as you could imagine, many of these students were their protegés, family, or related to their factions. Even if they had done something wrong that deserved severe punishment, they couldn't allow death to come upon them!
Heck, if these students had even sinned by committing the most heinous crimes possible, they would still leverage their power to protect them!
Yet...!!
Yet!!
Watching Dante calmly walk forward towards the Zero Gate itself, they couldn't find the words to speak to stop him. His words played constantly in their heads, not to involve themselves and avoid any fallout of this event.