am i the only one who thinks hanataro yamada holds some sort of relevance or importance to the current arc??
his zanpakuto is the only one that we know of (asides from unohana, but her whereabouts are in the grey zone ) that can heal.
he was/is in charge of cleaning the sewers, so he knows all the secret underground passageways that could be useful in during this war.
his older brother was the previous lieutenant of squad 4.