Ariwara Kado is know for both his sour and negative personality, but also his brutality in combat.He is very lazy, and does nothing but fight, sleep, eat, smoke, and complain. He is in Daitaro's class, and even sits behind him ( although, he is always asleep). The only reason he can get away with sleeping in class, is because the teachers are scared shitless of him xD. Whenever he is not asleep, something really big is about to happen.
SPOILERS START HERE!!!!
Ariwara Kado is the first person Daitaro fights. Kado attacks him the night he becomes a Tempest, to " See if he would be of any use to him". Kado later ( a few days later) saves Daitaro form three Oyakume ( for all the terms and shit:[link]
), killing all three of them. Quite a bit into the series ( after Armageddon) Kado is confronted by his Mana Eater ( who i've yet to name), who is now an Oyakume. As she attempts to fight him, Kado lets her, admitting that he still loves her, etc, etc. After a while, a big explosion happens, and Kado saves her life, putting both of them into a giant ice shell. While in there they make up and become parters again, so on and so forward. That's all I got for him so far.