Disclaimer: If you recognize it, I don't own it.
Mouse sneezed softly, rubbing her nose with one paw to knock the white stuff off it. She was shivering, the bright red fabric coat Usopp had made her now to wet from trudging through the white stuff to keep her warm anymore. Letting out a sigh, she knocked the tiny straw hat Usopp had also made her back a bit so she could see and kept walking. She had to find her humans, the other queen was counting on her to save her pet. "Luffy. Usopp. Zoro." Mouse called as loud as she could, hoping the roar of the wind wasn't drowning her out. "Chopper-Doctor. Sanji. Nami." She yelped when a big bunch of white stuff suddenly fell on her. It took her a few seconds to push her way out and by this point she was half frozen. "R-r-robin. Fr-fr-frank-ky. Br-brook. Wh-where are y-you"?
"Mouse?" Mouse looked up at the familiar voice, even if she didn't understand anything beyond her name. She squinted slightly before recognizing the somewhat chilled hand that picked her up.
"Fr-fran-nky. Miss Cl-cloud need's he-help." She said, looking back the way she'd come. Franky said something before bundling her into his shirt and turning to walk further into town. "No!" Mouse squirmed, wiggling out of Franky's hands and ignoring his startled yell. "Cloud n-needs help!" Quickly finding her feet, Mouse raced back the way she'd come, glancing back every few seconds to make sure Franky was following her. By the time Mouse reached where she'd left the smoky-colored queen and her pet she couldn't feel her paws, tail, or ears anymore. She crashed into the unconscious human's side, unable to stop in time. Franky's startled cry was all she heard before everything went dark.
Cloud watched the strange furry-human who belonged to the little cat she'd found as he checked on her pet. She'd been worried upon learning that little Mouse's pets were pirates, but her pet hadn't responded no matter how many times she nudged his face or yelled in his ear, so she'd been just desperate enough to trust them. Looking down, she smiled at the brave little runt she was curled around. "You certainly found yourself some nice pets, little one. Well done." She murmured to the unconscious little grey, leaning down to groom her still-cold ears. The strange furry-human had said Mouse and her pet would both be okay once they warmed up a bit, so now she was just waiting for her pet to wake up. He would probably be upset to have been saved by pirates, but there was just no helping it. At least the injuries the other pirate crew had given him weren't as bad as they'd looked, Cloud would have to learn more about this 'Sea Stone' if it could hurt her pet. Cloud's ear twitched when she heard her pet groan, seemed it was almost time to go. She listened with one ear as he yelled at the pirates, still focused on grooming Mouse. It wasn't until the sickbay door opened that she stood up and stretched, following her pet out after throwing a quick 'thank you' back to the doctor. Honestly, she didn't know what her Smoker was making such a fuss about. They may be pirates, but Cloud thought her runty little sister had found herself the pick of the little.
TBC
Special thanks to CreativityIsWriting for suggesting a name and gender for Smoker's cat as well as suggesting she be one of Mouse's litter-mates. Her idea was for either Mouse to rescue Cloud or cloud to rescue Mouse, however I just couldn't find a scenario where Mouse would be able to rescue a cat twice her size, so Mouse gets to save Smoker who lost consciousness in the snow after some pirates got lucky with a Sea-Stone knife or something instead.
Also, Tashigi was the one who found and named Cloud. She gave her to Smoker for his birthday.