Fenri Lunaedge

Fenri Lunaedge (フェンリー・ルナエッジ) is one of the bosses of Mega Man Zero 4. He is a Reploid based on the Fenrisulfr (also called Fenrir) wolf from Norse mythology. Fenri uses ice in battles and can attack at high speed. He occupies the Hibernation Chamber which houses old Cyber-elf experiments that have been asleep for some time. They begin to awaken, and Zero has to defeat them as well as Fenri.

Zero must fight him again, as well as the other seven members of the Einherjar Eight Warriors, on Ragnarok.

He attacks by creating clones of himself made of ice, spin like a ball across the screen, dashing towards Zero using the blades in his arms, and by launching ice slashes in a pattern. If the weather is tipped in his favor, the floor is sheathed in ice, making it even more difficult for Zero to avoid the fast-paced attacks. His EX Skill, the White Fang, involves him creating two large slashes, one on the floor and one on the ceiling.

Mega Man Zero Official Complete Works
Fenri went berserk due to a bug in the altered Cyber-elf he was trying out. To stop him from running wild, he was put to sleep in cryogenic stasis and the entire building was demolished. He was later revived by Weil for the purposes of Operation Ragnarok. As Popla Cocapetri and Noble Mandrago both have skills related to cryogenic stasis, Fenri has an inherent aversion to them.

Fenri has sharp claws on his hands and feet, and also has giant ice blades growing out of his arms. He could cause a lot of damage just by charging an opponent.

Data
Nickname: 凍月軍狼 (Tougetsu Gunrou, Freezing War Wolf)

EX Skill: White Fang (ホワイトファング)

Mission: Destroy the enemy

Zero's EX Skill: Hyougetsujin / Ice Blade

Trivia
.  Fenri Lunaedge appears as an optional boss in Area N in Mega Man ZX. There has to be a Mega Man Zero 4                                                     cartridge inserted in the DS to fight him.
 * Fenri Lunaedge is similar to Blizzard Wolfang from Mega Man X6. Both are based on a wolf and use ice attacks.
 * Fenri Lunaedge is one of five ice-themed robots who create ice sculptures. The other four are Chill Penguin, Blizzard Buffalo, Cold Man, and Frost Man. Also, he is the only one from the Mega Man Zero series to have this talent.
 * It seems that second part of his name comes from "Luna" - Latin word for moon (due to wolves' habit to howl to moon), and "edge" - synonym of "blade".