Souichi was sitting in the back of the classroom, all alone. He had a Voodoo doll on the desk which he was poking with a needle, on the dolls stomach. that's when Kai had a bad stomach pain and exited class to go to the restroom. Souichi could be heard giggling.

Souichi: "Hehe.. curse.. curse upon you! Kekeke.." he mumbled, he kept poking the doll

Souichi is a creepy student. He does Voodoo to curse others or use it in ways to pleasure himself. He also likes to shoot nails from his mouth