Siegfried

Siegfried (シュタウフェン, shutaufen) is the guardian ghost of Ashil

About
Siegfried is Ashil's guardian ghost. Little is known about Siegfried. It resembles a large robot with a mirror on the front. Siegfried's metal body can block many attacks, and can constantly regenerate from anything that harms its body using the ground. It can send out a blinding blast of light from its chest and also has an extra set of arms that it can hide and let out at any time.

O.S.
Attacks

Anime/Manga Differences
Since Ashil doens't appear in the manga, neither does Siegfried.