Fels achieved immortality centuries ago through the creation of the Philosopher's Stone, becoming a direct subordinate of the deity Ouranos. This transformation left Fels with a deteriorated skeletal body, eliminating the need for sustenance or sleep but retaining the capacity for fatigue. The experience caused significant trauma, resulting in profound self-loathing. Fels rejects the title of "Sage," instead referring to themself as "fool" due to regret over the stone's creation. Physically, Fels appears as a skeleton concealed beneath black robes, obscuring all identifiable features including gender. As a Level 4 adventurer, Fels possesses enhanced physical capabilities surpassing lower-level individuals, alongside heightened senses further amplified by level advancements. Combat proficiency combines strategic intellect with magical prowess. Fels utilizes items like the Occulus—a surveillance device—and a cloak granting invisibility and curse resistance, and deploys a familiar owl equipped with an Occulus for reconnaissance. Magical abilities include Concurrent Chanting, enabling spellcasting during movement. Key spells encompass: - **Dia Panakeia**: Healing magic that generates colored spheres of light with curative and curse-removing properties comparable to elixirs. - **Dia Orpheus**: Resurrection magic, which successfully revived the Vouivre Wiene after 800 years of failed attempts. Development abilities include "Mage," boosting magic power, range, and efficiency while providing Level 5 equivalent magic stats, and "Mystery," facilitating high-level item creation unmatched by contemporaries like Asfi. Personality blends intelligence, cunning, and loyalty to Ouranos, though Fels takes independent action when deemed necessary. Fels exhibits confidence in magical and combat capabilities but harbors enduring guilt over past actions. Interactions with the Xenos—sentient monsters—prompted a pivotal shift, revealing deep empathy and appreciation for their struggles. This culminated in aiding Bell Cranel's protection of Wiene, utilizing resurrection magic to save her. Fels expressed admiration witnessing Orario's faction leaders unite with the Xenos during the Knossos conflict. Fels orchestrates covert operations supporting the Xenos, including strategic appeals to adventurers' emotions to avoid confrontation—a plan thwarted only by Riveria Ljos Alf's interference. During the Knossos incident, Fels provided healing to Bell after battles against Dix Perdix and assisted in locating the artificial labyrinth's entrance. Fels's historical knowledge and experience as a "civilian officer" surpass even Finn Deimne's, though Fels remains ill-suited for direct tactical combat against commanders like Finn.