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. He uses ice in battles and can attack at supersonic speed. He occupies the Hibernation chamber. Zero also fights him with all the other 7 members of the Einherjar Eight Warriors on Ragnarok.

The Hibernation Chamber has old Cyber-elf experiments that have been asleep for some time. They started to wake up, and Zero had to defeat them as well as Fenri.

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 arm, 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 is similar to Blizzard Wolfang from Mega Man X6. Both are based on a wolf and use ice attacks.
 * The voice of Tetsuya Kakihara, Fenri's voice seiyu, is similar to Jun'ichi Kanemaru's voice, who voices Sonic in the Sonic Adventure games and the Sonic X anime. In addition, one of Lunaedge's attacks involves him spinning rapidly around, similar to one of Sonic's signature moves in the video game series.