Fenrir

Fenrir (フェンリル) is the Guardian ghost of Meril Inugami only appears in the PS2 videogame Shaman King: Power of Spirit.

Oversouls and Attacks
Fenrir can do a perfect O.S with Meril Inugami´s Izanami Amulet making a wolf´s head all around the arm of Meril, this O.S is named the Lunatic Howl.

O.S.
Attacks

Shiki sword technique: This technique allows Meril to create multiple hits then her final strike knocks the enemy down.

Maxim Fenrir strike: In the game when Meril activates this technique she might say "lunatic howl" or "eat this". This allows her to shoot a strike that has Fenrir's face. It does critical damage.

Lunatic Howl: This is Meril's ultimate attack. It uses almost all of her furyoku. When she uses this technique she rush towards the target with Fenrir running with her. After that Meril and Fenrir jumps in the air making a large aura around Meril and Fenrir and strikes the target.