Loeiz, also spelled as Loraize, Roiace or Loeyze, was Nele's mentor and is a seasoned musician. He is very knowledgable in all kinds of instruments, and also has researched the history of music in Erinn. He is a pillar of the school of thought that magical music stains the purity of music.
Loeiz gets in contact with the player multiple times as they train their Musical Knowledge skill.
Loeiz has authored multiple books:
- Musicians of Erinn
- String Instruments: Hand-Made Melody
- The History of Music in Erinn (1)
- The History of Music in Erinn (2)
- The History of Music in Erinn (3)
- The History of Music in Erinn (4)
- Wind Instruments: Melodies of the Soul
- His name never has been consistently translated.
- Loeiz is the Breton variant of the name Lewis.