House Dianisia is one of the founding families of Lithavania and only remaining among them that still supports House Arcturus.

Prominette Goyumscye belonged to a merchant family that came into wealth thanks to House Arcturus, thus keeping close business ties with them. When the three Arcturus children appeared in Kolonia, few made their fealty known to them, the Goyumscye being one. Prominette grew up with Varen and Vetrise, even once courting the young heir for a time.

Marrying Ser Draken Dianisia, a fellow Arcturus loyalist, she continued her support of the family friends, but Vladmir Blair's involvement with her husband created unease. With Draken receiving special permission to act as a secret envoy between Bal Hora and its alliances, Prominette supported this while also accepting a task from Engel that only she could do; act as rendezvous and operator of Lumas Interlo outside of Kolonia. It would not be until Amunda was born did they leave their home and begin building Ebrem Castle.

Learning of Cachusa's situation, Engel reached out to her beforehand, using Lumas Interlo to shelter them from those that sought them; the speculations that Blair was involved did not escape Prominette, but accusations would put her husband in a predicament. With her agents with eyes upon Cachusa and Miriam after reaching Lamda View, it was not long before a revolt was staged by the Penumbra there and contact with them was lost. Eventually once they resurfaced a year later, Prominette had them brought to Ebrem immediately to safeguard them.