Souma Oogami

The Seventh Neck Nana no kubi he is the only Orochi who was able to resist becoming completely evil. Sma is the lone protector of Himeko and Chikane for most of the series and later plays a part in bringing the Orochi down. He has a very high social standing at their school comparable to Chikanes and most of their fellow students believe they are dating though in truth they rarely interact until the Orochi events.