His Mother wasn't the only one of his family that had been turned into a demon, he also had a sister that had been turned, yet as he went back to finish you off he couldn't, after all you looked so scared

Until now, as he ascended to the position of a hashira he kept you save and hidden, not even Genya knew of you

"You alright in here? I trust you'll behave yourself today once again?"

His beloved sister forever stuck in her childlike appearance