Evankhell

Evankhell is a High-Ranker, who is the Ruler of the Second Floor. All that is known about him is that he is very tall, and very high Ranked, he is roughly around the 60th Ranking, which is very strong, strong enough to scare Evan Edrok, who is roughly 400 ranks higher than Yuri Zahard. He is supposedly very strict, as when Yu Han Sung is worried by the thought of Evankhell finding out about all of the trouble on the Second Floor.

According to Hachuling in Ch. 25: 2F - Crown Game (End), he is said to have an extremely high shinsoo resistance.

Supposedly, he killed the former ruler who belonged to Great Family and took ownership of the Floor(from fancafe Q&A on Naver.com). As he doesn't belong to a Great Family, he is not part of the Ruling Class and it is unknown why he has agreed to the complex testing system on the Second Floor.