Marrion Saereth is the youngest son of Aldrin Saereth I and Olina Blockely. He is seven years younger than his oldest brother, Darren

In appearance, he resembles his father, with the typical golden hair and tall aristocratic bearing of House Saereth, but in his disposition he is more similar to his mother; he is gentle at heart and the hurts of others drive him to pity. 

Fearing for his safety, he fled to Skyfall along with many members of his household after the death of his father.