Merlin (Mārin マーリン) was the elderly wizard who was in a party set out to kill Monster Lord Alice XV. Along with Marcellus, Lazarus, and Karen, they realized too late of Alice XV's wishes for coexistence, and then sought to make amends for their horrible mistake.
He can be recruited along with Lazarus in Part 2 during the Grangold siege.
It is unknown how he survived and now the Don Father in Monster Girl Quest Paradox.
- In the Arthurian Legend, Merlin was the greatest wizard in history that served as the adviser to King Arthur.