The Evanescence of Yachiru

Monsters roam even the upper worlds. One such monster destroyed the light of Captain Kenpachi Zaraki's life.
One day Yachiru disappeared and Squad Eleven fell into despair. With all the free time he could muster he began to painstakingly search everywhere he could. However, if she was still alive she alluded him and soon he realized she was dead or worse.
As the days without Yachiru grew to months and then the months blossomed into years and Kenpachi grew colder, angrier and his harshness became legendary throughout the Seireitei.
However, even in the moment of despair a glimmer of hope can emurge.