Koon Maria Zahard (쿤 마리아 자하드) is a girl from the Koon Family who was said to have been selected to become a Princess of Zahard.
Maria is one of the many children who belong to the Koon Family. Koon Aguero Agnis describes her as a kind, polite woman who knows how to care for others. She is older than him.
Koon Aguero Agnis explained that he achieved having her becoming a Princess of Zahard instead of his full biological sister. Eventually, this led to the downfall of Aguero's close relatives and his being discarded from the Koon Family.
There were rumours dealing with the true nature of Aguero Agnis and Maria's relationship.
Khun Maria Jahad (LINE)
Notes and Trivia
It is assumed she is a Regular as it fits the timeline better than her being a Ranker. Besides Lo Po Bia Shilial Zahard evokes rejoining her which ought to be quite difficult if the alternative were true.
Although Maria has yet to make an official debut at the story, she made a brief appearance in one of the author's blog posts.  SIU announced on his Twitter account that Aguero and Maria were getting ready for a party at that time.