[Once Karamatsu- who is wearing his shades to hide a really bad black left eye- is over his shock at their terms, here, he hefts- with considerable difficulty- something up onto his podium.

It's a shovel.]

I found this while looking over the cafeteria. It is a shovel having belonged to Miki-chan, I believe...the metal spade is smeared with that same purple splatter that Slaine-san is mentioning. What is more, the metal floor beneath the shovel was all scratched up.

Adding on the fact that this shovel is extremely heavy...whoever has done this must have considerable strength to heft this shovel, assuming it was not Miki-chan herself.