A new student who enrolls as a 'Weed' (Second Course). Described as an under-achiever with some deficiencies, he maintains a somewhat philosophical expression. His arrival begins to change the calm campus.
Miyuki relies on Tatsuya for protection during the extremist threat.
Strategic partnership where Mayumi leverages Tatsuya's abilities for school security while respecting his autonomy.
Contracted protector relationship that transforms into a highly effective tactical partnership during high-stakes operations.
They maintain a shared living arrangement under family supervision.
Highly coordinated engineering partnership where Katsuto handles leadership and strategy while Tatsuya executes tactical operations.
Mayumi exercises command authority over Tatsuya, directing his strategic interventions during the Nine Schools Competition and the Yokohama Disturbance.
Professional engineering partnership that transitions into a steadfast friendship as Mikihiko overcomes his initial insecurities.
Loyal engineering partner who provides tactical support and combat readiness throughout the series.
They navigate their new departmental curriculum together.
Relationship marked by initial friction and jealousy, gradually resolving into mutual respect and coordinated teamwork.
Formal military coordination relationship that facilitates JDF intervention during major school crises.
Erika and her team operate in the same operational theater as Tatsuya during the parasite capture.
Guardian relationship that provides domestic stability and emotional support for Honoka.
Colonel Sakai represents military interests that intersect with school events and operations.
Both operate within First High School's defense network against external threats.
Explore the full interactive character relationship map of The Irregular at Magic High School