Evelyn Martin

Gran is what Nina calls her grandmother. Nina has lived with her Gran since her parents died in a car accident. She didn't appear in the show but her voice was heard in the first episode when she called Nina about how she was doing at "Harry Potter Land" or how she's doing at her new school. According to the credits, she was portrayed or voiced by Barbara Barnes. Not much is known about her but, Nina said she is staying in a hotel near the "House" and she will be visiting soon. This week she will be guest starring. She helps improve Nina and Fabian's relationship.

She is portrayed by British actress Gwyneth Powell

Personal Life
Her granddaughter, Nina Martin lives with her since her parents died in a car accident. She lives in America.

Nina Martin
(Unknown-present; Granddaughter)

Her only known relationship on the show with interactions. They live together when Nina was still in America. Nina is good with old people because she lived with her grandmother before she went to boarding school. She is staying in Nina's room at the moment since the hotel she was staying in flooded.

Victor Rodenmaar Jr.
(Season 2) 

She thinks that Victor is cute.

Fabian Rutter
(Season 2)

She helps Fabian with his relationship with her granddaughter.

Trivia

 * Her Dutch counterpart from Het Huis Anubis appeared in the show and was also heard on the phone talking to Nienke Martens (Nina's Dutch counterpart).