Valentina is the youngest of the royal family, essentially only bord for the purpose of replacing Leo (who died). Growing up, Kimerikh treated her better than any of her other kids so she could keep Valentina around for longer. Kaamaari (knowing their moms true nature) tried to warn Valentina, which only made her furious at him for even insinuating that their mom did something so evil. She chose to live in ignorance before accidentally findng proof of all of Kimerikh's bad deeds, and then lost her mind for a bit. Afterwards, she bonded to Kaamaari and works with him to stop Kimerikh.
Now she takes pleasure in all the things Kimerikh would hate to see her doing, like drinking and sneaking out and partying. She uses a disco ball covered in spikes as a weapon.