Fenrir

Fenrir was a member of Cult of Diablos, being the 5th seat in the Knights of the Round. He is killed by Shadow.

Background
Fenrir was once known as the strongest magic swordsman who lived hundreds of years ago.

Fenrir made a name for himself around the world using his weapon, "Blood Fang" which is the sacred sword of a swordsman who was once called the strongest.

Also, he is a greedy assassin who only wants to increase his own power, making him a feared assassin in the Midgar Kingdom, known as the "Devil of Midgar" to which everyone who lives in the kingdom knows and even fears his name and nickname.

At some point, Fenrir joins the Cult of Diablos and becomes the 5th seat Knight of Rounds. Fenrir and his faction control the Midgar Kingdom's underworld from the shadows for a long time. Fenrir had a long rivalry with Loki, a fellow Rounds member.

Fenrir knew that Petos was promoted to a 10th seat Knight of Rounds, but he had never acknowledged Petos' position as his equal and stated that his promotion was nothing more than a substitute, as normally he wouldn't be able to become a Rounds and the performance of his achievements were weak.

Powers & Abilities
Fenrir favorite weapon, The "Blood Fang" sword which was longer than his height and had a fiery blood-red blade, also the sacred sword of a swordsman who was once called the strongest.

Trivia

 * His name is derived from the giant wolf Fenrir from Norse Mythology.