In The Light of Dawn, Hollyleaf couldn't bear being a mixed-clan cat, so she fled her clan and entered the tunnels, where she lived with Fallen Leaves, an ancient cat who had become lost inside. In the four-part series The Return of the Warriors, Lionblaze discovers her after she helps the lost Pigeonwing and Ivypool escape the tunnels, and takes her back to the clan.
I just found out that Sister Dong is a long-haired cat