Character
Kise Ryota (MC)
(A/N: The MC has the same appearance as Kise Ryota from KnB, with more or less the same personality. So MC will call some people with -cchi in this fic)
Abilities :
Original Spell:
Copy: He can copy any spell he sees, but with weaker power and more magic usage.
Summon Heroes: He can summon famous people from the past, as long as he has a memento from those people. After the summoning is successful, he will be unconscious for some days. Summoned people don't need mana to live, they can perform simple magic, but to use their ultimate skill (noble phantasm) Ryota needs to transfer his magic to them. While transferring, Ryota couldn't use any magic.
Sacred Gear :
the King's Law: Basically sacred gear with Gilgamesh power. This sacred gear gives him an eternal youth because the effect one of the treasures inside Gate of Babylon : the potion of youth. This sacred gear doesn't have a balance break because from the start of awakening sacred gear, Ryota already can use all the abilities. The only downside is Ryota can't control his power output very well.
Harem :
Tsubaki Shinra
Osakabehime
Tamamo no Mae
Shuten Douji
I'll add more when a girl officially joins the harem.
AUTORENGEDANKEN 
MaTachin
MaTachin Sorry for everyone that wants rias, akeno, asia and koneko in the harem, but I'm not gonna add them. They are overused and I've always preferred side characters to main characters.
For anyone who wants to recommend the harem of FGO, maybe I'll add more, but please not Jeanne or Saber or Scathach.
As I said in the paragraph above, it's not that I hate them, but I prefer girls who are not popular.
Wöchentlicher Energiestatus
-- Power-
Rangliste 
-- Power-
Stein