|Spoiler Alert: The following article has information not currently present in the anime or manga. Do not proceed unless you want to be spoiled. |
Yumina met Touya when he came to the royal castle of Kingdom of Belfast where he cured her poisoned father, and she fell in love with Touya at first sight as she kept staring at him constantly during their first meeting. After taking some consideration, Yumina proposed to Touya. Although her proposal was rejected by Touya, her father helped her so she could at least get engaged to Touya.
As Touya's first wife, Yumina is arguably the clingiest of all wives, and while she believes that all of Touya's wives are of equal status, she is quite insistent on doing everything first.
Yumina finds that Touya's personality is desirable. Using her mystic eyes, she could not detect any ulterior motive within Touya's intention for helping her family and any royal member. It is because of noble thing that Touya had done that caused her to instantly fall in love with him at first sight.
Yumina met Lucia when Touya saved her from a coup in her country, during which Yumina offered Lucia and her father asylum in the Belfatian Palace. The two are in good terms due to their similar ages and love for their husband.
Yumina met Kohaku after Touya unexpectedly summoned the divine beast. She was intimidated by Kohaku's aura that she could not speak properly as mentioned by Touya Mochizuki. Despite being frightened by Kohaku, Yumina showed her compassion when Kohaku was fainted because of Touya's magic. She even started to become friendly with Kohaku after Touya finishing his summoning contract. Yumina also started to hug the child-sized Kohaku even though she had been afraid of her earlier.
Her father and the current King of Belfast
Her mother and the current Queen of Belfast
Her newly born younger brother and the Crown Prince of Belfast
Her uncle and the current Duke of Belfast
Her cousin and the daughter of the Duke of Belfast
Edward Ernes Ortlinde
Her newly born cousin