Norn is the daughter of Paul Greyrat and Zenith Greyrat and the younger sister of Rudeus Greyrat. Due to being teleported with only her father, she has a strong attachment to him and hates anyone that hurts him. She is an independent girl that grew up without much of Paul's attention. Unlike her other two siblings, she is a common girl and gets compared to Aisha a lot, and because of that, she has an inferiority complex.
She has her own official fanclub in school, unknowing that her brother plays a huge role in it.
(Source: Mushoku Tensei Wikia)