Rifujin na Magonote

Rifujin na Magonote (Japanese: 理不尽な孫の手, lit: Unreasonable Backscratcher) is the pseudonym of a Japanese author best known for his original novel series - Mushoku Tensei and Orc Eroica.

Magonote rarely appears on-camera and likes to keep his privacy. When he does make an appearance, he wears a characteristic helmet to cover his face. This helmet is of the same model donned by Orsted (a character in Mushoku Tensei) to keep his curse at bay.
- Mushoku Tensei Wiki