Honoo, known as Honoo adulto in his matured state, is a supernatural entity and one of Mosquiton's primary subordinates. His connection to Mosquiton predates the events involving Inaho Hitomebore. Honoo shifts between a childlike form and an adult form, typically transforming during combat or situations requiring heightened capabilities.

In his adult state, Honoo wields pyrokinetic abilities, generating and controlling fire during confrontations. He demonstrated this power defensively for the group, particularly Inaho, during the London pyramid mission by incinerating reanimated mummies impervious to conventional weaponry while they pursued the O-Parts.

His loyalty to Mosquiton remains consistent. Honoo and fellow subordinate Yuki actively participate in expeditions across diverse locations, including London, an Indian Ocean cruise ship, and Shanghai. He is present during conflicts with adversaries like Count St Germaine and Queen Parao. While the group dynamic often revolves around Inaho's demands, Honoo fulfills his role within Mosquiton's retinue without directly challenging her authority.

Honoo maintains a pragmatic relationship with Inaho, following instructions such as awakening promptly for missions despite abrupt demands. However, moments like the cruise ship segment reveal potential exasperation with Inaho's behavior, especially her volatile interactions with Mosquiton's former associate, Camille; Honoo's reactions in these situations remain observational, not confrontational.

His vulnerability surfaces against specific foes. Camille exploited a moment of distraction, incapacitating Honoo and Yuki during her shipboard confrontation with Inaho, highlighting limitations despite his enhanced adult form.

Throughout the documented adventures, Honoo provides consistent combat support through his adult-state fire abilities, accompanying the core group in their hazardous pursuit of the O-Parts against various antagonists aligned against them.