I have a character idea too.
Foxtail is from Fernclan. She was born a runt and barely survived, so she has a sympathy for underdogs. She is a warrior, but she lives in a little extension of the den that's colder and cramped because nobody wants to sleep near her or acknowledge that she exists more than necessary. She isn't totally alone though. When she was an apprentice, on her first hunt she caught a sparrow chick that had fallen out of her nest and would be an easy kill. But it was so helpless. She couldn't kill it, so she brought it home with her and raised it. Even her siblings thought she was weird. So she spends her time running through the forest and climbing the trees to be closer to her sparrow, Willowmist. She feels happier running. 
Since no one trusts her to hunt, she spends most of her time with the medicine cat climbing trees to reach hard to get medicine. and generally hanging out with the medicine cat. She's even made friends in other clans since hers hates her so much. She's good enough at fighting though that the clan keeps her around. She can run off foxes. Maybe she also secretly has a crush on whatever warrior is the most popular, but he thinks she's weird.
She's medium and strong with red and white fur. 
Is that ok?