Yūma and Osamu share mutual respect for one another. Yūma admires Osamu for his honesty, sense of duty, and eagerness to help others at a cost to himself. Osamu looks up to Yūma for his fighting experience and strength. He wants to give Yūma reason to keep living. Yūma is considerate of Osamu's position in Border. He tries to advance Osamu within the organization's ranks and decides to take on the task of taking Osamu and Chika to A-Class.