is bleach episode 155 filler?

6th Division Lieutenant Renji Abarai is startled to sense Rukia Kuchiki's Reiatsu rising and attempts to learn if she is winning by concentrating, only to admit in frustration that she is too far away for him to tell. Suddenly, Renji is mutually shocked alongside Dondochakka Birstanne to find the latter standing in front of him and angrily demands that he not show his face because it puts Renji at risk of a heart attack from fright.

When Renji wonders why he was so surprised, Dondochakka explains that he was startled by Renji screaming so suddenly and talking to himself, which leads him to ask Renji if something is wrong with him.