User blog comment:Xilinoc/Ch. 570 (I can't think of a witty title at 11 pm)/@comment-8669536-20140227091342/@comment-11051098-20140228162838

Ichigo, Kensei, Ikkaku, Byakuya, Yamamoto - none of the Bankai users we have seen have grown longer hair from releasing their Bankai.