For most of the series, Long hid behind the scenes while overseeing Rio's training. Long would appear before Mere to guide her assistance or cause trouble for the Gekirangers while keeping his distance. Long gradually becomes more involved blocking Rio from moving too soon, corrupting Mere, and manipulating the Kenma. Long offers to train Rio and converts Rio and Mere in the Blood-Oath Ceremony. Mere's interference revealed Long's treachery and true identity, and he takes her hostage to force Rio into resuming his role in his master plan. However, when Rio and Mere defy him by discarding their Genki, Long decides to kill them and find someone else to become the Destroyer.