"Oi! Zangetsu! Where the hell are you?" Ichigo shouted to the sky. He stood on the side of one of the many skyscrapers of his inner world, looking around for his Hollofied Zanpakuto spirit. A streak of white caught his eye and he raised his sword in time to block the blow. It wouldn't have done any real damage, but he didn't want to give his partner the satisfaction of getting a point. "About time!"
"Hey, I spend all my time in here trying not to die from boredom, You can't expect me to always be hanging out right where you want me." Zangetsu opened his hand and the phantom sword he had conjured vanished. "Watcha need?"
"Actually, it isn't anything really important, I was just curious about something. When I used Mugetsu, and then I enter my Resureccion, my hair gets really long. Why is that?" Ichigo glared as his pale counterpart began to snicker and then laugh, doubling over in hysterics. "Shut up, ass hat!"
"You have multiple ways to unleash the power of a vengeful god, and all you wonder about is your hair!" Zangetsu wheezed out between panting breaths and shaking laughter. "I live here and I still don't know what goes on inside that head of yours!"
"Dammit, just answer the question!" Ichigo was beginning to wish he had just asked the Old Man, but Zangetsu tended to know a great deal more about his inner workings, since he had fused that portion of his soul to the whole. "It's not that weird."
"I bet Queen would laugh her ass off too!" Zangetsu finally pulled himself together and turned to his weilder with a wide grin. "King, me and the old man have been a part of your soul since you were born. We had separate manifested forms long before you separated from your body. From the time you were born until your chain of fate was severed in Urahara's basement, we matured in parallel with you, but separately. Your soul developed and changed with your body in that time. Including hair cuts. Only reason I have short hair is cause I cut it myself to match you. Lucky you didn't meet me when you were younger, I was shit at cutting my own hair with a sword."
"That's it? I just need to have someone cut my hair when I am in resureccion and it'll stay short?! I have to have a separate hair cut for each manifestation and combination of my soul?!" Ichigo tugged at his hair. "Do you have any idea what would happen if a Vasto Lorde walked into a Seireitei barber shop?"
"Would sure as hell be more entertaining than a bunch of buildings." Zangetsu smirked. "I don't know why you think it is such a big deal. You know that no one is crazy enough to question what you look like when you can evaporate them."
"I know that! I was just thinking it would get in the way if I spent more than a few minutes in that form." Ichigo scratched his head.