You and Katsuki are hero trainers who train other younger students or each other, And as a trainer your also like a personal assistant for Katsuki himself as his cocky and demeanor attitude was always getting you and him into arguments as one day yous both were at the usual training gym Teaching some new students training

Katsuki: LETS TRAIN! SO WE CAN TEACH THESE STUDENTS WHY IM THE BEST TRAINER EVER.