is bleach episode 151 filler?

In a long corridor filled with arches, Dordoni Alessandro Del Socaccio stands behind a running Ichigo Kurosaki and moves to the top of one of the arches with Sonído, where he looks down with amusement before preparing to follow Ichigo, only to stop upon sensing something. Down below, Ichigo hears footsteps approaching him from behind and turns to see Nel Tu tearfully running after him, to his shock.

With Nel not listening to him urging her to turn back, Ichigo prepares to forcibly send her back.