User blog comment:Piyush Banerjee/Shin DxD 2 discussion/@comment-181.28.144.222-20190203004121/@comment-34061653-20190204122518

Likely because of his huge boost to such a level in a short amount of time despite that his sacred gear isn't a Longinus. Sairaorg is all aboht raw power and yet you don't see his raw power increase Heavenly Dragon he equips himself with Regulus (A Longinus). Yet Kiba makes a jump already to Heavenly Dragon class in speed (to the point where he's faster than Issei) when just in vol. 24 his speed was roughly at Maou class?