Gibul Wisdan is a 15-year-old male student born in 1838, attending Alzano Imperial Magic Academy as a member of Class 2 with the mage rank of Duode (Rank 2). He sports black hair, black eyes, and glasses, typically wearing the standard academy uniform.

He enrolled at the academy on April 4, 1852. Later that year, on December 24, 1852, he joined Rumia Tingel and Class 2 in organizing a surprise birthday party for Sistine Fibel. During the Magic Competition arc, Gibul represented Class 2 in the Dueling event alongside teammates Kash and Sistine Fibel. After Kash fell to Kreiss Eins and faced taunting, Gibul intervened and decisively defeated Kreiss, securing Class 2's overall 2-1 victory against Class 1.

In the Field Study Expedition arc on Cineria Island, Gibul opposed Kash's plan to sneak into the girls' room at night, opting to remain with Cecil. This choice spared them from the consequences others faced. He initially resisted joining a volleyball game but later participated when a chance arose to compete against Re=L's team. When instructor Glenn Radars departed temporarily during the expedition, Gibul advised his classmates against pursuit, asserting they should trust Glenn to resolve the conflict independently.

Gibul demonstrates a pragmatic approach, loyalty to classmates, and a tendency for dry observations, exemplified by his remark "This is too entertaining" during events. His actions consistently show a preference for avoiding unnecessary risks while supporting group efforts aligned with his judgment.