|This page contains major spoilers. Read at your own Risk!|
A few years ago, Glenn, who had lost his family due to an accident, was adopted by Celica Arfonia, who works directly under the Empire. After a while, she soon came to love him as a family. She taught him all she knew about magic, which fascinated him. Although he doesn't have a strong sense of mana manipulation and chant reduction, he was enrolled in Alzano Imperial Magic Academy at the young age of 11 and graduated at the age of 15. He was an outstanding mage killer code-named "The Fool". This job he had eventually caused him to lose his admiration or interest for the magic arts. This incident results in him abandoning the military.