Here's a One-Shot I wrote for a challenge in LightClan. I hope you enjoy!
Silverstripe sat at the fresh-kill pile, staring worriedly at the medicine den. Wails echoed in the clearing and cats froze in their tracks. Outside the medicine den paced a black tom with green eyes. He poked his head into the den and was immediately shoved back outside. "I just want to know if she's okay!" he hissed. A light grey tom poked his head out of the den.
"She's doing fine!" he growled. "But she won't be if you keep distracting me!" The black tom shook himself off.
"Well, I'm sorry." he said sarcastically.
"Of course you are." the grey tom rolled his eyes and disappeared back into the den. Silverstripe purred and padded over to the black tom.
"Don't worry, Blackshadow." She reassured him, "I'm sure she's doing fine." Blackshadow whipped around.
"How can you be sure, Silverstripe?!" he demanded. Silverstripe shook her head.
"If I know my sister, which I do, I know she can pull through. She's the strongest she-cat I know. Trust me. You don't have to worry." Blackshadow growled.
"I hope you're right. The kits weren't supposed to come for another half a moon!" Suddenly, the grey tom reappeared.
"Blackshadow. You should come in." he bowed his head and disappeared back into the den.
"Oh no!" Blackshadow wailed, leaping into the den. Now it was Silverstripe's turn to pace. She padded back and forth as the cats inside whispered and wailed.
Silverstripe's eyes filled with tears as she remembered that fateful day. Her sister had had four kits, three of them stillborn, and died soon after. That kit had been so frail, so small. No-one believed it would survive. But little Minnowkit, named after her mother, had survived. And more, she had become leader of her clan.
Silverstripe watched proudly from the entrance of the elders' den as Minnowstar announced the patrol orders. She looks just like her mother, Silverstripe though, remembering her sister clearly. Silverstripe had never had kits, but she felt as proud as a mother towards her sister's once frail she-kit.
Now, Silverstripe was on her way to StarClan, and old memories of her sister kept flashing in her weak mind. Wonder if she will be the one to lead me to my place among the stars, she thought, reaching for the mouse an apprentice had brought her not long before her flashbacks. Dear sister, Silverstripe called telepathically to her long-lost sister, are you waiting for me now? She wondered. She imagined her sister lying down next to her, young and beautiful as she had been the day of her death. Oh, it has been seasons since we last shared tongues, Silverflight remembered, stretching her forepaws out in front of her and discarding the half eaten mouse.
"Silverflight." the scrawny elder's ears pricked as she heard her name called.
"Sister? Are you coming for me already?" she called, turning her head to see Minnowsplash, her fur dotted with shining stars, sitting next to her. It was as if she could feel herself growing younger by the heartbeat. Minnowsplash's starry form nodded and Silverstripe lay down on her side. She purred, welcoming the long forgotten scent of her only littermate. "I am ready, sister." Silverflight closed her eyes and suddenly floated to her paws.
She could see her sister vividly now. Minnowsplash bounded playfully around her and Silverstripe purred. She glanced down at her sleeping form below her. "Goodbye, my clan." she gazed proudly at Minnowstar before turning her back and following her sister up the glittering trail to the stars.