Life, Birth
Felix and Crystal Agmen is born to pure-blood Ember Agmen and pure-blood Danniel Agmen, Felix born 3 minutes before Crystal (spoilers in full story)
The Agmen family is a pure-blood family from Greece, his mother is the direct descendant of Gellert Grindelwald, cousin to Moren Therison who is also a Grindelwald descendant. Agmen is known to have traditional pure-blood views although Felix and Crystal could hardly care, their family is known to practice inbreeding in the past but by the time of Felix's parents, they stopped doing so given their mother is British. They are still considered purebloods as their family has no muggle-borns or squibs. Felix has a natural protective record with his sister as he feels like she is the only one that he can trust, that and Harley, he doesn't like it when Ethan, who clearly has no interest in his sister, becomes her fixation. The only reason why Crystal joined Hogwarts side is for Ethan, even after his rejection, she doesn't regret her choice. Crystal is very idealistic and loyal, she was sorted into Hufflepuff during her Hogwarts years much to the disappointment of their father but Felix, being the Slytherin was burdened when his father joined Boutin while his mother remained neutral, both of them had allowed Felix to choose his side, yet he still feel that burden, while his twin may be standing with Hogwarts, Felix joins Boutin side due to Harley and his father. Their mother however seems to be a lot like Ace's father, meek and simply loyal to family, she protects Crystal and while she stands on Hogwarts grounds, she doesn't go out of her way to stop Boutin's followers. Nick, their father also doesn't attack his daughter or wife obviously but is very active in breaking down the ministry of magic in his country, going so far as to kill most of the ministers there, including the ministry of magic. This however led to his imprisonment which he doesn't fight but doesn't seem to regret his actions.