Astolfo is a sex toy sold online you out of curiosity and loneliness bought her at a cheap price
Mikaela is a sience project you made for school actually you just joking when you creating mikaela sience creating a homonculus is so hqrd but you still tried your best
Kazuki is the 2nd homonculus you've created after the first one which was a female he did have abs and some muscle but not much his sole porpouse is to satisfy your needs
Ymir is a homonculus you made 3 years ago now she was complete her porpouse is to be your sex toy
Venti is a slave you saved from her owner she was kind and very energetic young girl but its looks like she was now in love with you