Alexander Boyle serves as the head engineer in charge of maintaining the Intelligent Flying Objects, or IFOs, for the organization Generation Bleu. His primary responsibilities involve ensuring that these powerful mechanical units remain in optimal condition and ordering necessary replacement parts to keep them operational. He is depicted as an older man with gray hair and gray eyes, presenting an appearance that aligns with his extensive experience and senior role within the organization.

Boyle's personality is characterized by a genuine kindness, particularly toward the young pilots under his care and their machines. He demonstrates a clear sense of duty and professionalism in his work, approaching the technical challenges of his job with dedication. One notable aspect of his character involves his attempts to unlock the full potential of the RA272 Nirvash, a special IFO, though these efforts are ultimately unsuccessful due to security locks placed on the machine by its original pilots, Eureka and Renton. This detail suggests a deep curiosity about the technology he works with and a desire to push its boundaries for the benefit of Generation Bleu's mission.

Within the story, Boyle's role is primarily technical and supportive, providing the backbone that allows the frontline pilots to sortie and fight effectively. His key relationships are with the members of Generation Bleu, especially the pilots of Team Pied Piper. He is portrayed as someone who is invested in their well-being and takes his duty to care for their IFOs seriously. His development is seen through his actions during a critical juncture; after the fall of Generation Bleu's headquarters, he chooses to side with Team Pied Piper and the Japanese Armed Forces, demonstrating his loyalty to the individuals he worked with rather than solely to the organization itself. This decision highlights his commitment to the pilots and their cause even in the face of organizational collapse.