Sado dodged another blow from Renji, and sent a shock wave at him,
trying to be the victor. He had to work his hardest, try to become
stronger. Ichigo could no longer count on him, but he wanted that to
change with all his soul.
When he had witnessed the fierce intensity in Ichigo's eyes when Ichigo had protected him from that arrancar, Sado felt an immense pang of loneliness. Ichigo no longer trusted him to watch his back. Sado, swearing on the armor on his right arm to become stronger, poured all his soul into training for Ichigo's sake.