Well done to XxFallenAshxX for guessing the last cat- Russetfur! Keep guessing!
A cat with paws that flew like the wind,
Who soared across the leafy ground,
Slain by the one with the fur that was dark,
Across the path lay shadow's hound.
Sibling of mouse, who was never trusted
To teach, by a leader who thought she was busted,
Died in 4, which was a shame.
Now tell me dear, what is my name?