Harem

Akeno Himejima

Rias Gremory

Sona Sitri

Tsubaki Shinra

Murayama

Katase

Momo Hanaki

Reya Kusaka

Tomoe Meguri

Tsubasa Yura

Xenovia Quarta

Irina Shidou

Rossweisse

Koneko Toujou

Kuroka Toujou

Grafiya

Serafall Leviathan

Ravel Phenex

Jeanne

Ingvild

Yakasa

Mittelt

Kalawarna

Raynare

Jeanne D'Arc

Jeanne D'Arc Alter

Artoria Pendragon (Lancer)

Artoria Pendragon Alter (Lancer)

Ishtar

Ereshkigal

Scathach

Skadi (Maybe not sure)

No multiverse travel, just some change in plot to introduce some Fate characters.

Sheesh Too many

Well I won't butcher any character and it won't be a dumba** harem so don't fear.

Leaving it aside comment if you want to add and post their images as well at their name.

Peace