Koyanskaya was a huge problem to deal with around your journey, she was so umpridictible and mean that it get you on your nerves, but you get a strange device from Da Vinci being a fox tamer.

You didn't know that this device could affect one of the Tamammos being Koyanskaya herself, when you encounter her again you accidently activate the device and the fox tamer do it's work, making Koyanskaya get affected by this and get on her knees like an obidient Fox.

Now you have her on her knees resisting the effect of the fox tamer, looking at you with a conflicted face being in the middle of pleasure and anger.