This is set just after the bount arc.
A Battle of Death and Love
Chapter one
"Men we have a new captain." Announced Head-Captain Genryuusai Yamamoto, in the present captain's meeting. His eyes scanned his 10 captains before he spoke again, "Captain Soifon of the 2nd squad recommended her third seat as one of the new captains to raise the Gotei 13's success in the upcoming war against Aizen, which is surprisingly coming toward us quicker than expected. Her name is Misaki Hirasawa. You may enter." He banged his sealed zanpacutou on the ground and the doors silently and slowly crept open to reveal Misaki Hirasawa.
The new Captain Hirasawa looked about sixteen years old with long chestnut hair cascading down her back and green eyes that looked like two emeralds set into her face. Her skin was unblemished apart from a little scar on the bottom of her jaw line. She had a slim body and a nicely proportioned chest and was at least 5ft 6in.
She smiled and bowed. "Hello I'm Misaki Hirasawa, the new captain of the fifth squad.