https://www.pixiv.net/en/users/5962741
https://twitter.com/muku2project
https://muku2project.fanbox.cc/
https://skeb.jp/@muku2project

Torrent includes PSDs of 045 - 103, 119 - 142, 147 - 160, 186 - 193, 199 - 202, 204 - 213, and 215 - 219.

Oldest to newest

BON-CHI's original characters are "Yuni" (Brown-haired cow girl) and "Momo" (Long, pink-haired cow girl)

012 has a slime girl on the right based on Satomi Tachibana from Dumbbell Nan Kilo Moteru?
045 - 068 is an original character requested on skeb by an unknown client
149 - 152 is an original character requested on skeb by https://twitter.com/kisy_on_magica
198 - 202 is an original character requested on skeb by https://twitter.com/kuroyottu of their avatar
203 is based on a figurine from https://twitter.com/karaumatikin/status/1345389880235311111?s=21
252 - 253 is based on a Sailor Moon villain called Otedamako