Momozuka being the former owner makes so much sense, I'm mad I somehow didn't pick up on it. Regardless, this was a fantastic twist.
With yamikin work and Ushio hurting Burst, perhaps this is a sign that Mako does personally care for Tatsuhiko past using him as a tool. He was able to send Inukai to his death to hurt Burst, but he may help Burst to in turn help Tatsuhiko..