She has a big resentment towards Aguero who chose to side with Khun Maria Zahard, and betrayed his own biological sister. Kiseia seems to love Aguero's older sister, and already considers her as her own big sister since she helped her in the competition to become a Zahard's Princess. The trajectory of her dagger resembles lightning and is therefore hard to block. She killed a lot of her older cousin's rivals in the Zahard's Princesses competition.