Some people believe that she is Josy's mom.
Yes, and it's easy. You have to be on Jill's route, go on a picnic, fight for Jill, but don't forget to balance your affinity and stay at least Neutral. Of all these choices, only two are major DIK choices: hitting Tybalt and fucking Jade.
In the Church of Saint Tybalt,
Tremolo MC Fuckface is the most terrible evil - an analogue of the Christian Lucifer. He's waiting in hell for all the sinners who don't like watermelons, don't steal girls' panties, and don't play the cello.