Your Gilgamesh looks really weak to me. He is the king of heroes. His personality should be more dignified. Not just follow along with Rias and her side kicks.

I would change things a bit more(for example i hope Rias and Akeno Will be much tougher and hard working than Canon) and fix some grammatical mistakes, for the rest nice. Good work.

You should have Ozymandias make a appearance

I think you need put more arrogance on Gil on the fight because it was his trademark and will be more distinguished from fate/series

i can only suggest that you improve your pacing more

Pretty good dialogues and nice chapter overall, i'll think of something. By the way, monday was my birhtday, i consider this your gift.

Interesting

Well... i hope Gilgamesh not join Rias or Sona peerage

Meeting the Hero Faction will be fun

In short, Facts', details', condense, plot, tell-it,

ahem,

there must be a prologue, events pertaining to the DxD half.

since this appears to be Gilgamesh of Fate/, "Reincarnated" into DxD it would imply Gilgamesh

started out in a simple manner.

The "idea" of Fate(series) gilgamesh being "reborn" in DxD is, Uncommon but not unheard of.

The only real things' are,

If THE Gilgamesh IS reincarnated then, does he carry the memories of his other self
(from the fate series)

and which religion was he born into, Human, Asgardian, Olympian, Egyptian, that kind of thing?

This requires the proper prologue/origin-story where gilgamesh began as the reincarnation up to,
what you have in this chapter, OR,

is this, A Gilgamesh descendant, blood of THE hero and only the abilitys' of the
Fate series counterpart?

I WANT to see where this goes but the description confused me,

Please make it clear in an author' note?

Are you gonna put him in a peerage if not thanks and pls give him gate of babylon

Not bad chapter at all, i liked the brief work.

Withouth harems too big, this could be interesting. And don't give him Gate of Babylon, if not as a Balance work.

Beautiful story.