Colonel Stiles, whose full name is given as James Styles, is an American military officer who appears as a character in the Monster Strike: Mermaid Rhapsody original net animation. His background is tied to his work with a company named NADTDcom, where he is involved in an effort to find a method to control Monster Strike monsters. The primary motivation driving his actions is to harness the power of these creatures for the benefit of the American military's strategic advantage.

In the context of the story's role, Colonel Stiles operates as an antagonist figure who represents the military-industrial complex's interest in exploiting supernatural forces. His key relationship is with the corporation NADTDcom, as he works alongside them to achieve his objectives. Regarding his abilities, Colonel Stiles is notable for his use of a powerful monster named Oceanus in combat and operations. No further details are available on his personality, specific character development arc, or other relationships from the searched material.