Runningswift was "born" to Moonlight and Eagleswoop along with his sister, Amberheart. When Runningswift was an apprentice, Hawktalon was his mentor. Runningswift battled along side his sister, Amberheart, and saved her life quit a few times. When him and his sister found out about their real parents, he was mad as well, but convinced Amberheart to forgive Brightstar. Runningswift had no issue about Amberheart getting the deputy position, he was proud of her.
Runningswift soon took on a mate, Snowfall, and they had three kits together, Darkkit, Gorsekit, and Fernkit.