User blog comment:B214/High School DxD EX/@comment-1359322-20150913235748/@comment-11721917-20150914075814

So the future kids' being more powerful than their parents at that stage is plausible. I can't imagine their strength exceeding CCQ.

@anon: For Irina, it could be one of those generic lightsabers like the one Freed used. Those can still be called holy swords.