User blog comment:B214/High School DxD EX/@comment-178.237.101.5-20151130122815/@comment-104.7.80.176-20151201130632

No once devils reach adulthood they age far more slower. Sirzechs & grayfia and lord gremory & venelena gremory are examples of this as they are centuries old but look young in their 20's and 30's respectively.