Dr. Akamashi was a scientist formerly employed by Forland Kingdom's royal family. He abused lost technology entrusted to the monarchy to initiate a coup d'état that killed the king, primarily seeking total control over the advanced systems. Information from the technology corrupted him, potentially under Cecilia's influence.

Using ancient "Old World" technology, he created twin android bodyguards Ana and Yuna. Ana specialized in close combat with an aggressive personality, while Yuna handled long-range attacks with shyness; both protected him fiercely. Despite their enforcer roles, Akamashi viewed them as daughters with genuine paternal affection. His expertise spanned robotics, organic artificial lifeforms, and monsters deployed during his uprising.

During the coup, Akamashi demanded Princess Alita be captured alive for unclear reasons. His reign ended abruptly when Prince Kaito—revealed as the Dark Knight—killed him mid-sentence from behind after Akamashi discovered Teoria's location, a powerful entity or artifact.

In an alternate narrative interpretation, profound loneliness preceded Ana and Yuna's creation. After losing research funding, he modified them for theft and criminal activities, driven by their desire to restore his happiness. Witnessing their weaponization later sparked remorse, leading him to entrust their protection to an ally and accept imprisonment willingly.

His legacy included the twins' heroic sacrifice. Ana and Yuna vanished alongside other lost-technology beings like Dominikov and Pete Armstrong when Teoria deactivated, erasing all such artifacts from existence.