Izuku has command seals and servants from the Fate/series for a quirk.

The command seals recharge by about one each week and if he doesn't use any charges for a month after he's fully charged then the number of seals will increase by one. Also his quirk makes certain that he only summons female servants, and all of his servants are summoned already infatuated with him.

Obviously a harem fic.

I will be using characters from other anime for some of the classes of servants and have more servant classes than Fate/Grand Order even has. 

Also all servents are scaled up to Quirked standards, the Alter Ego, Gunner and Healer classes are good examples.

Classes and servants I'm thinking of using at this time are:

Ruler- Jeanne d'Arc

Avenger- Boudica

Saber- Nero

Rider- Madusa

Archer- Chloe von Einzbern

Assassin- Jack the Ripper (I'm making her Chaotic-Neutral for story purposes)

Lancer- Rin Tousaka (Fate/EXTELIA Last Encore)

Caster- Helena Blavatsky

Berserker- Violet Evergarden (from the anime of the same name)

Shielder- ????? Fujimaru (An oc that is Ritsuka[M] Fujimaru and Mash Kyrielights daughter, I will take suggestions for her first name)

Alter Ego- Atalanta (Think of her Archer form but in a bikini with an open front skirt, shoulder armor, elbow length gloves, knee high boots, and dual belts with a quiver of arrows on each hip. She will have ranged attacks obviously with the arrows in her two quivers being different, right quiver arrows hit like shots from a railgun and left quiver arrows multiply to make gatlinggun level barrages.)

Moon Cancer- BB

Foreigner- Kefla (The person that Universe 6's female Saiyans fused into in the tournament of power.)

Beast- Nowi (Fire Emblem Awakening)

Healer- Florence Nightingale (Her Healer class form will be wearing a red Chaldea Combat Uniform and use a combination of super High-tech  medical implements and Magecraft to heal others, three guesses where she got the upgrades.)

Gunner- Oda Nobunaga (Think her Archer form, but in an armored Sailor Moon uniform with the part that's normally white being golden and the colored parts being mostly black. Also instead of flintlock rifles she summones a variety of modern guns from shotguns to machineguns to RPG launchers, to top it off her noble phantasm is going to be the same as her archer form with each gun being randomly chosen but the same number of guns.)

Performer- Illyasviel von Einzdern (Fate/kalied liner PRISMA*ILLYA) (Obviously with the power to wear the 7 original classes from Fate/staynight, she will eventually get other classes)

Dancer- Mata Hari

Destroyer- Nezha

Lover- Chaos (Sora no Otoshimono AKA Heavens Lost Property)

And more.

Please leave suggestions of Servant Classes and Servants you want to see.