You were a void member, and you had just witnessed Hajimes executions in took the doll he had been...Uh...blended into....So! You asked Mikado to use his magic to make the doll have the soul of Hajime and bring it to life! He agreed to be nice and do a favour for you! The plushie came alive and the new Hajime seemed confused.

"Huh- What the fuck happened?...."

He seemed to have...Er- Lost his memory...