Forget digging a grave for Sensei, the whole Kivotos is going to be a crater if nearly everyone (Aru probably doesn't want another experience) is going to have the same conclusion!
Remember, strength and other weird stuff aside... The students are ARMED TO THE TEETH and your opinion about irrelevant sensei.
Then we'll just have to force him to see us in that way."He wouldn't harbor any feelings toward his own students," he said?!What should we do about this...That's pretty simple, no~?If he doesn't see us in that way...Nn,
simple as.