So, this is my interpretation of what happened when Ukitake was stabbed by Wonderweiss, and what should have happened afterwards. I hope you like it and please review! Oh, and I don't own Bleach or the characters.
Kyoraku spun around and stopped. Everything stopped. He was in the midst of a battle, but he wasn't. His arms dropped to his sides, and he almost let go of his zanpakto, because there was nothing a sword could do at this moment. There wasn't anything anyone could do.
All Kyoraku could see was red over white, blood red over snow white. His favorite color was white, a very specific shade of white that was now splattered with red. How had this happened? He hadn't even done anything. He had been watching. The one thing that Kyoraku could clear from his mind was worry about the one he loved most, but he had been wrong.
Time continued to stand still, and Ukitake continued to float in the air, a look of shock across his bloodstained face. His white hair, now dappled with red flew out in all directions. It was almost beautiful, but his eyes were slowly closing, and growing dimmer. Kyoraku tried to move forward, but he couldn't. He tried to speak, but he couldn't. He couldn't do anything.
Kyoraku was then filled with anger. He couldn't do anything! He couldn't save him. If only he had been more cautious. He should have been watching him, he should have been more alert.
Ukitake's hand reached out, slender fingers stretching towards Kyoraku. Kyoraku reached his hand out as well, but suddenly Ukitake was far away from Kyoraku, plummeting towards the ground.
"No!" Kyoraku began to shout, but he felt cold metal at his back. He didn't turn around. He didn't even care at this point. The cero hit him hard in the back, but he could barely feel the pain, because his mind was numb. Kyoraku fell, and his only thought was at least they would fall together.
Kyoraku stumbled through the rubble. Where was he? Aizen was probably in the middle of destroying the world, but Kyoraku's world would be destroyed if he didn't find the man with the flowing white hair. Ukitake.
Kyoraku picked up his pace, ignoring his own injuries as well as he could.
Suddenly, pain surged in his side, his vision went dark, and he tripped and fell, rolling through the debris. He finally came to a stop, lying on his back, facing the sky. He stayed there, and stretched out his arms. They brushed against a soft fabric. He looked to his side, and there he was, hair gracefully draped over his eyes.
Kyoraku's heart jumped and he bent over his … friend. He touched his fingers gently against Ukitake's frail neck. Then he held his breath.
Kyoraku smiled. He rolled onto his back and inched closer to Ukitake. He curled his fingers around the other captain's hand, and he couldn't hold back his laughter when his own hand was squeezed in turn.