Almost all the characters from almost all AVN are made from the same model, bud. It's called Genesis 8/3
But, seriously, it's a lot more complicated than "the same base model" (but I'm not gonna lie that there are three main characters who look suspiciously similar to each other)
Oh, that's interesting, I didn't know that. That's probably why I've been pausing billing on my Patreon page for 5 months this year. That's probably why I've never done cross-promotion with other Devs to quickly find new patrons. And that's probably why I still haven't published my game on Steam and keep working on it (along with developing regular updates) until I'm satisfied with the final result. Yep, seems "just to make money" to me.