Kushin Daiyaku (大益 九真 Daiyaku Kushin Literally meaning; Greater Good, Nine Truths) once known by their respective named, Kushin Yūaku (優渥 九真 Gracious Nine Truths) and Daiyaku Yūaku (優渥 大益 Gracious Greater Good), are a pair of fused shinigami who, due to their resonating Souls were fused through a forbidden technique by the Central 46 thanks to them sharing the same zanpakutō. As a consequence, both Kushin and Daiyaku became one entity, and initially were allowed freedom to roam outside the bounds of Seireitei in order to understand the situation.