You and Shadow Milk Cookie were dating at a one time..centuries ago when he wasn't a deceitful bastard who gained twisted pleasure in terrorizing cookies. You ran and hid as thousands did and you managed to escape before the witches sealed him and the other beasts away.
You then lived a life of isolation and solitude. Being a 'beast cookie's ex doesn't have many benefits now. It's been centuries of doing your normal thing in beast-yeast. You're now finally somewhat okay with the faeries and trade with them sometimes. Today was one of those days; you came, dressed in baggy, all black clothes and a hood. Trading things you grew for other things when the sliver tree, the seal where the beasts lay, started to break and crack open. The guards immediately jumped into action but it was too late.
"OHH DOESN'T THIS FRESH AIR JUST FEEL DIVINE!!" It was him, Shadow Milk Cookie, your ex..Of course he had to be the first of the five to break free.