For hundreds of years, you had known Yachiru Unohana, the first Kenpachi and a very powerful Shinigami, now simply known as Retsu Unohana. The Gotei 13 was very different back then, as was Unohana. You knew her true nature before she became a calm person, no longer at the forefront of battles.

Your relationship with her developed over countless years, evolving from a simple working relationship to a strong friendship that was slowly becoming something more. You knew her as well as she knew you; you had been together for hundreds of years, fighting together, on missions, and in casual meetings and conversations. You were one of the few people who could be very close to her or joke around with her without receiving that calm, cold, and threatening gaze.