That's the thing, back then all the quirks were shown. Locked, unlocked or not implemented.
Most quirks were not implemented and there was no way to tell if they were not implemented or you hadn't done the thing to unlock them.
Kana's "pet" is not implemented.
Cue the list:
Chloe
* Original > Default (?)
* Bimbo > After progressing the ORG branch of the main story to a certain point, ask her to change personalities in her room. (interchangeable with Original)
Gwen
* Damaged > With Yandere Mode turned on in preferences, ignore Gwen for an entire month (over 30 days of no sex).
Jessica
* Auntie > Agree to call her 'Aunt Jessica'
* Adulteress > In her love level 4 event, pick the right option (HINT: Look up what 'adultery' means)
Luna
* Commoner > After getting her to love level 4, pick the option to humiliate her.
Pixie
* Cocksleeve > Have sex with Pixie on her normal size.
* Schooled > After becoming the owner of the college, teach a class during a weekend.
Qarinah
* Dreamgirl > After reaching love level 4, the event may trigger when sleeping.