Melan Blue

A living weapon Monomakia, known as a Gun-Swordsman, Melan is the main hero of the series. Melan is tall and humanoid in appearance, wearing blue armor. A set of retractable wings extend from his back, apparently needed for flying. A narrow, single-edge sword is attached to his right arm and a powerful laser rifle is on his left. Melan has no actual hands. He can reach and grab objects, even a newspaper, with a set of tentacles that extend from his chest.

Melan is discovered by Marin and assigns himself the mission of protecting her from Monomakia that would seek to kill her. For what reason so, he doesn't talk about, apparently under orders of strict secrecy. A century ago, Melan stole Creis from Brigadoon and sent her to Earth to save her from renegades. Melan fought single-handedly against many other Monomakia. After defeating them all and safely hiding Creis, he was sealed into his ampule and kept at the Nezu Shrine where he was later released by Marin.

Melan is fairly emotionless and doesn't understand human life. Only after observing Marin for some time, does he come to understand peace. Melan is courageous beyond all definitions of the word and doesn't stop fighting, even when critically injured. He has a strong sense of honor and justice.

(Source: Wikipedia)