Helmut Felt patrols the crime-ridden district of "Outside" in the fictional city of Libra as a dedicated police officer. Partnered with detective Sonia Summers, he investigates cases intertwining systemic corruption and supernatural dangers. Known for his stoic demeanor and emotional detachment, he prioritizes duty over personal connections, rarely revealing reactions to the chaos around him.

During investigations, he crosses paths with YOUKAI-NINGEN—a trio of marginalized supernatural beings who defend humans despite societal prejudice. His reluctant alliance with them forces him to grapple with the limitations of institutional protocols versus the urgency of embracing unorthodox tactics to dismantle corruption. In *Become Human*, he navigates moral gray zones shaped by the Unseen Council, a shadowy entity exploiting societal fractures to maintain power.

His arc reaches a turning point when he shifts from unwavering compliance to quietly aiding the trio’s defiance against injustice. This subtle transformation reflects his acknowledgment of systemic complexity, moving beyond emotional restraint to tacitly align with those challenging a fractured society’s entrenched hierarchies.