User blog comment:B214/Question and Answers 6/@comment-207.242.44.6-20181214200140/@comment-37165251-20181215130843

Yes Kokabiel was not Maou Class...but he fought in the Great War against the Maou and the Srephim...and for what we see in DxD now he would be annihalated in an instant...thats what i mean he is shown weak in DxD (clearly a plot device because he should have been stronger than Sairaorg ...but as we see in the LN and Anime Sairaorg would be kill him even without Regulus Nemea)