Fire N'ex serves as captain of the railway fire brigade within the Hikarian Special Vehicle Team. An Edokko from Tokyo, he communicates in a frank, straightforward style with a consistently lively and energetic personality. He operates a specialized fire trailer during firefighting operations and employs a chemical fire extinguishing arm as his primary weapon. Certain depictions show his fondness for the human character Minayo Kanda. His Edokko traits and spirited demeanor remain consistent across all appearances, including the original video animation.