As I mentioned in my previous post, Kiyoko was used by her mistress, Josephine, in all sorts of experiments. An effect of those experiments is that she produces some delicious and addictive enchanted milk that's rich with enough mana to contend with some of the highest quality mana potions, but like I said, it's quite addictive too~ Not only that, but her milk can even serve some healing purposes instead of needing a spell or health potions. Just one sip can rejuvenate someone who's at their limit and might even energize them for a while longer. It can definitely make certain activities last for an extended amount of time~
Another perk Kiyoko gained from all those experiments is shown in the last few pictures. It's her ability to transform a certain part of her into that of a male minotaur~ Oh, and yes, it's fully functional~ In fact, the semen she produces has the same qualities as her milk along with being highly potent and thick~ To some extent, Josephine believes she turned Kiyoko into a demigod of fertility despite Kiyoko not actually having that title, but she could definitely pass as one with her abilities.