So the prince is related to the blond mage (cousin) from one of his parents. Let's say Parent A. Parent B is related to the Diarmuid (The tower master mage dude), so the blond mage is also cousins with MC. Jaina, the MC, is not related to the prince. Hope that helped!
I think the blond haired mage (Jaina's cousin) , his mother was as I remembered was Diarmud sister and his father is of royalty or vice versa. So the Prince and Jaina are unrelated to each other.
can someone pleeeease explain the family tree to me like how is everyone related cuz last i checked the prince is jayna's cousin or something???