User blog comment:Jopjopjop/Volume 19 Spoilers/@comment-104.7.80.176-20150225170016/@comment-24502975-20150226002205

Eh? You mean he hasn't been doing serious training all this time...?

Pretty sure Ise wouldn't have that much of a problem against Belial, but that's just me. Maou-class was what Euclid was at without BG. I think Belial is just there to show that Ise has become around Maou-class in strength.

Anyway, if they did die, it isn't permanent as they have the Holy Grail.