Need chara suggestions for heavily pregnant stuff (Patreon)

Hi guys! I would like you all to give me some suggestion for a heavily pregnant stuff. I wanted to try one of my fav artist CoffeeSlice did. Something like growing diary(?) or progression.

I may or may not pick / choose the chara from your suggestion depend on the character if it interest me or not, but a few characters i have in mind for now are Kitagawa Marin, Ichinose Asuna (again), Kakudate Karin, or Timido. If you have any.other suggestions just put it down below

But because i'm slow, i will only do like 4 phase / progression maybe.

I dont know if i could make it as beeeeg as him but i wanted to try it first. 

Either start from small belly to big belly or instantly from big belly to massive belly