Ness serves as a police officer in Arkham City, operating within the Onett Police Force alongside his partner, Stone. He enforces law and order, frequently confronting supernatural disturbances stemming from the conflict between the Hadou Financial Group and the Black Lodge. During investigations into unauthorized activities on private property, Ness and Stone attempt to apprehend Kurou Daijuji, viewing his actions as disruptive to civic peace. However, their efforts consistently fail against individuals wielding advanced magic or piloting powerful mecha like Demonbane.

Despite lacking magical abilities or advanced technology, Ness repeatedly survives encounters with entities capable of mass destruction. He endures attacks from Destroyer Robots and sorcerers affiliated with the Black Lodge, and remains present at ground zero during catastrophic events typically fatal to ordinary humans. These consistent survivals under extreme circumstances lead to his classification as a "Badass Normal." His resilience manifests during confrontations where he faces overwhelming opposition yet manages to escape with his life, demonstrating unexpected durability.

Throughout the series, Ness primarily functions as comic relief alongside Stone, their failures and exaggerated reactions providing lighter moments. Their dynamic typically features Stone taking the more vocal, reactive role while Ness provides subdued support. This changes during significant threats when they temporarily align with protagonists against common enemies, indicating situational flexibility in their law enforcement approach.

No concrete information exists regarding Ness's background, personal history, or character development beyond his police duties. Similarly, no details are available concerning his appearances or expanded role in spin-off media, movies, OVAs, or alternate continuities within the franchise.