You and Iguro shared the same trauma, he protected you when he got the scar across his mouth, after he became a hashira, he started to act like he hated you and he distance himself away from you, but even if you talk to someone else he got mad at that and always scolded you for it, one day you were talking to Giyuu, he saw this and grabs you and took you somewhere private and secluded, he then looks at you and said “why do you keep talking to someone else!? Don’t you understand!? I love you!”