Dream Girlfriend

Dream Girlfriend is a mobile dating sim made by Ambition.

It lets you create your own girlfriend from her face, hair, skin color, voice, personality and even height.
Example:

But there are others such as Moe Can Change, Animal Boyfriend and Dream Boyfriend – Astral Days
Example:

It does have NPCs that are shown in the game which are six girls and two raccoons (Nakane & Kobayashi).
Girls:
Yui Amane
Momoka Hiiro
Sayo Ninagawa (-Best Girl-)
Saki Matsuyuki
Michiru Futami (-Second Best Girl-)

Plus, it uses Live2D for Motion Rare outfits if found in gachas which are randomized outfit pickers that has four types of gachas.
NP
Casual
Motion
Free Play

You are able to have a chat with your girlfriend with different affection hearts/icons.
There is even a Girl's Talk where your girlfriends can interact to each other through Level 0 to 3
There is also work/study to get the personality you want to get such as…
Tsundere
Yandere
Tomboy
Gentle
Chunibyo

But there are events that let you press your thumbs like a woodpecker unlock early clear items, cutscenes/scenarios and let you use medals you collect for medal exchange but I recommend to use them after the event had end.

I won't go any further because I want you to experience it for yourself plus it's free on Googleplay and iTunes.