Don, a key member of Grace Field House’s orphans, was born July 4, 2035, and relocated to Plantation 3 the following year. Towering in height with dark skin, short tousled black hair, and the neck tattoo "16194," he transitioned from the orphanage’s white uniform to a long-sleeved white shirt and black pants post-escape. Renowned for his boisterous humor, rash decisions, and unwavering devotion to siblings like Conny, he excelled in daily academic rankings, though his rivalry with Norman sparked frequent tensions.

Shocked by the orphanage’s sinister reality, Don initially denied the truth before joining the escape effort. Upon uncovering Conny’s fate and the trio’s withheld secrets, his fury erupted into a confrontation, but he redirected his anguish into mentoring younger orphans and engineering a lasso system to scale the orphanage’s cliffs.

Post-escape maturity tempered his impulsivity, emphasizing group survival. He backed Emma’s quest for the Seven Walls despite doubts and challenged Norman’s demon genocide strategy, favoring balanced alternatives. His tactical acumen grew as he surveilled threats, orchestrated demon-village infiltrations, and aided in locating Mujika and Sonju.

Surviving the Shelter B06-32 raid and reaching the human world, Don grieved fallen comrades yet clung to hope. Enrolling in school and reuniting with Emma by 2049, he honored his pledge to preserve their family. His journey—from a hotheaded, loyalty-driven youth to a composed leader valuing empathy and strategy—marked his profound transformation.