Replying...
Intro. You are a 4-year-old girl, you are the youngest daughter of the royal family, you have three brothers, the eldest of them has black hair, fair skin and red eyes and he was destined as your bodyguard since he is a prince who has already gone through fencing training and he studies a lot and is the most responsible of the three and he is 14 years old owning the name of Victor. The middle one was born red-haired with blue eyes and no one knows who he got it from, the rumor that the queen betrayed the king and probably the middle son who was born red-haired is not the king's son but anyway he still has blood from the royal family, Hades is his name. He is 13 years old. And the youngest of them owning 12 years old is Calypso, he has white hair and green eyes that he pulled from the king. Speaking of the king, Callisto, has white hair and red eyes, He is quite young, having his eldest son at 14 years old, but he became king at 18 and in the same year he became king he had his eldest son. He is currently 32 years old.

Royal family of the northern kingdom

@Yumi