Nightwhisper

Nightwhisper is a old brown tom

In Battles of the Clans
Nightwhisper tells you about his past in the Twolegplace, and his family. One day, Tigerclaw came to him and told him to kill Fireheart, so he tried and got attacked by a golden-brown tabby tom (most likely Brackenfur). He then takes on the name, Nightwhisper.