Mrs. Grumbmiller was said to be mean and to have a large mole on an unspecified part of her body. When she made Kai and Nya go to bed early, they tripped her.
She didn't cook for them because as Nya thought, her cooking was terrible, so Nya volunteered to make dinner.
- According to Tommy Andreasen, the thing Kai and Nya fought over the most as children was who got to trip Mrs. Grumbmiller next.
- On February 22, 2021, Tommy Andreasen asked on Twitter for the name of Kai and Nya's nanny, saying that he forgot.
- As Andreasen shared Nya's character interview in May 2021, it's understandable that he was writing the interview at the time he asked this question.