Free Cell features in "Phi-Brain - Puzzle of God: The Orpheus Order", depicted across two life stages. Childhood flashbacks reveal a formative bond with protagonist Kaito Daimon, establishing their connection before the series' primary events. Within the present narrative, Free Cell operates as an antagonist aligned with the Orpheus Order, targeting Kaito for rejecting the Armband of Orpheus and obstructing the organization's pursuit of human evolution. This adversarial stance forms a central conflict, rooted in a shared history preceding their opposition within the Orpheus Order arc.