Arias "Ace" Hono commands the Fire Robo as its Robo Master within the Red Wings team, specializing in firefighting and fire prevention. His expertise originates from family tradition, as his father is a knowledgeable fireman. Ace operates with a highly analytical and self-reliant mindset, demonstrating strong confidence in his own abilities and a preference for independent action, often encouraging teammates to rely on him. This self-assurance can manifest as overconfidence or arrogance, especially initially.

A significant rivalry develops between Ace and fellow Red Wing Taiyou Ozora, fueled by their opposing methods: Taiyou's instinctive "survival natural" approach contrasts sharply with Ace's reliance on intellect, knowledge, and strict protocol adherence. This difference sparks friction and competition. However, through missions, Ace gradually gains respect for Taiyou's unparalleled courage, learning the critical importance of teamwork. Despite their clashes, Ace internally admires Taiyou's boldness, recognizing it as a quality he lacks in high-pressure situations.

Beyond his rivalry with Taiyou, Ace exhibits competitive tendencies towards teammates like Makoto Aikawa and Daichi Hayami. A lesser-known vulnerability is his intense fear of injections. Following his service with Machine Robo Rescue, Ace volunteers to become an instructor for the next generation of MRR members, demonstrating his growth into a leadership role and commitment to training future rescuers.