Magic Knight Rayearth Unofficial Website

Ferio is the lost brother of Emeraude. Ferio was "dismissed" from the Royal Family by Emeraude, for his own safety. His memory was erased therefore he did not know of his royal heritage. The Magic Knights encoutered him in the "Lost Forrest" where Fuu tricked him to being their "bodyguard" until they get out of the forrest.

Ferio has good swordsmanship, He is a greenhaired boy with a really long sword (the sword is longer than he is) he found the three girls when he was lost inside the silent forest seems to be that he likes Fuu a lot, but he has a secret: He is the lost brother of the Princess, so he is a Prince but he didn't know it until his sister died by the hands of the Magic Knights.