User blog comment:DYBAD/Character Sheet/@comment-26362471-20170624013538/@comment-4867780-20170630093947

Indeed ! They are as cute on the inside as on the outside, and like nothing more than cuddling and playing around ^ ^ They have quite the fighting spirit when it comes to protecting their mistress though, and will face any opponent with unshakable resolve.

Familiar are essentially mini-buttlers, following their mistress around, serving and assisting them in their various activities, and are appreciated as much for their adorable loyalty as their faithful service. They may be "stored" in citizens' personal database when needed (notably during adventures), or sent to one of the Selforge Domains dedicated to Familiars, tailor-made chibi paradises for the little cuties to chill out and have fun among themselves.

They have human-level intelligence and are capable of speech, which allows them to be very useful in many situations and quite the enjoyable company ^ ^

I opted for the idea of choice to ensure they are really wanted, which makes them their mistress' little babies in a way. They are usually created during citizens' childhood though (what little girl wouldn't want one of these ? ^ ^), so it largely amounts to the same with the extra mommy touch.

I updated the Steel Sirens' section (last paragraph), which should provide some answers ;)