is bleach episode 5 filler?

Having brought Karin Kurosaki back to the Kurosaki Clinic and put her to bed, Ichigo Kurosaki runs down the street while wondering how long it has been since he has seen Karin cry. Noting that Karin and Yuzu Kurosaki were crybabies up until their mother died, Ichigo recalls how Yuzu took over their mother's housekeeping duties in the following years.

Ichigo also remembers how Karin stopped crying altogether so she would not worry the rest of her family because she did not have much skill in anything, and how she did not cry once even after losing a fight with an upperclassman, being reprimanded by the principal, or breaking her leg while hiking.