Nils is a man with a dark-colored hair in a bob style.
Nils is shown to take his duty seriously.
Nils attends the Royal Knights Selection Exam and is placed on Team I with X and Ruben Chagar. Before their first match, Nils and Ruben question who X is, so Rill drops his disguise. During their first match, Nils and Ruben destroy the crystal after Rill defeats their opponents. Afterwards they have to drag the captain who is distracted and critiquing his painting.
During their second match, Nils and Ruben decide just to support Rill. The pair panic when faced with Team K's Compound Magic, but Rill is able to redirect the Thunder Arrow and destroy Team K's crystal.
Several days after the exam, Nils and the others selected to be Royal Knights all assemble in the Royal Capital and are placed under the command of Mereoleona Vermillion. After the squad change into their new robes, Mereoleona introduces additional members and reveals the location of the Eye of the Midnight Sun's base. After the squad travels to the Gravito Rock Zone, Mereoleona explains the situation and divides the squad into teams. Nozel Silva infiltrates the dungeon with Nils, En Ringard, and Siren Tium. Nils is impressed with Nozel's displays of strength.
Suddenly Nils and Siren begin glowing and are possessed by elf spirits. The two then release their magic and turn on Nozel and En. After En and Nozel escape with a smoke screen, Ado brings the other elves in the dungeon into the central room. The dungeon is then steered toward the Clover Kingdom and their revived brethren.
- Nils ranked #45 in the second popularity poll.