Quote Originally Posted by slayerx View Post
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Yes it is.


From the bleach wiki
"He(Kenapchi) named her "Yachiru" in memory of the only person he had ever admired."
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....well then, we know what the backstory is now. Kenpachi knew Team Mom in the past, back when he was but a simple weakling. She beat him and it knocked out his brains, and that's when he met Baby Yachiru.