Where Hotaru is light, noise, and speed, Sileo is shadow, silence, and patience. He cannot catch her by chasing her (she is too fast); he can only catch her by predicting her. Their dynamic would be a game of chess played at breakneck speed across a neon city—The Hyper Swindler vs. The Immovable Object.
The central character is (also referred to as Hotaru Midorikawa in early iterations), a private investigator who operates her own agency. Hotaru is defined by several key traits: hotaru the hyper swinder