Kurayami Kai is Iris's valet, bodyguard and childhood friend. They met one rainy night when she was really young and had wanted to escape her prison of a home when she found him unconscious in the streets and severely injured. She couldn't leave him alone so instead of running away she took him home with a lot of difficulty since he was much bigger than her and looked to be about 21 years old at the time. He didn't have a name so she named him Kurayami Kai. Much like Iris, Kai is a non human thus being the reason why he didn't age at all ever since she found him. Despite their constant bickering, the two of them have a strong bond of a Goddess and her Warrior.
Francis is the Head Butler of the Nightray Dukedom and one of the very few people who knew about Iris being a Goddess. Although he serves the family, his loyalty lies with his Duchess and was there for her when she lost all of her family. He was grateful to Vincent for returning her to the Estate after finding out that his youngest master; Elliot had been the Head Hunter all this time. He has a lot of forgiveness in his heart and he knew how much his young masters and mistresses were all manipulated by their father so he could only watch from afar and protect them any way he can. He continues to run the estate to ensure that Iris has a place to return home to after all the tragedies that had befallen upon her. He is also a doting grandfather figure to Iris's children.
FC: Tanaka from Kuroshitsuji. UN: @NightrayButler
Maria Duval
Her name is Elizabeth but Maria is the title she takes on as the Head Maid of the Nightray Dukedom. She is a very loving elderly woman who has a sort of grandmother vibe to her though she can be very scary when she starts scolding someone. Bernard is somewhat afraid of her because she once spanked him as a child for causing trouble. She adores the Nightray family like they were her very own flesh and blood and was more than happy when Iris gave birth despite the father of the children being a commoner. She was not aware of Iris being locked up as a child until one day she was told to bring a tray of food to the White Room by accident. She made sure to feed the young Iris a lot and tried to reason with her insane master about releasing his daughter from such a place. She will be forever grateful to Vincent who had been the one to show his adopted siblings about their lost sister.
UN: @NightrayMaid
Alanna Harvenheit She is one of the maids working for the Nightray Dukedom and was personally handpicked by Iris. She's an orphan living in a convent for all her life and the only thing she remembered about her family is that they gave her a jewel pendant. Alanna doesn't know much about what the jewel was really for until Iris came along and told her that the reason she took her away from the convent was to protect the last living survivor of the Harvenheit family who were Jewel Summoners. Iris, being a non human was able to detect the jewel and tracked it down to the convent where she had seen Alanna sweeping the floors of the church happily with the pendant around her neck. To ensure the girl's safety from the demons that had wiped out her entire bloodline, she chose to bring Alanna with her. Of course, Alanna was more than happy to have been brought to a loving home where Francis and Maria took care of her like they were her parents. Alanna views Iris as a big sister rather than a master which the Goddess didn't mind though didn't really open up to anyone after the loss of her family members. Alanna swore to protect and serve her Duchess by training with her powers under Francis and Kai. She's rather clumsy though so half the time she's always tripping over nothing. She brought out Iris's gentle side when she asked her to help with her powers since Iris herself had powers of her own.