Rocket is the brother to Missile and Jet. The three Borzoi brothers are spies for Hougen's men. Rocket spies on Reika and finds out where Gin, John and Akame are. He reports back to Hougen and so he and his men surround the shed. John and Gin are beaten and taken hostage along with Reika. Rocket later joins Weed's pack to find out more information and in hope to corner Weed to kill him. Jerome suspects him as being Hougen's member right from the start. While a 'member' of Weed's pack he experiences Weed's care and compassion for each of his soldiers. In the night time Rocket scares some of Weed's fllowers by aying Hougen has 500 men and blames it on the old dog named Carl. Later on that day when Weed and Rocket are alone, Jerome watches from afar. One of Hougen's men tries to kidnap Weed, but Rocket takes him down. Weed lets the bad guy go since he's frightened and Rocket is dumbfounded by his kindness.

When the Ou pack is travelling Rocket kidnaps Weed who is in the back of the pack. GB tries to catch him but he is to slow, then Jerome shows up. Rocket's brothers assist him but Jerome is able to defeat the three Borzoi brothers. After this fight Rocket decides to join Weed's pack for real. Something about Weed and his comrades inspired him. He left his brothers and they returned to Hougen. Rocket asks Weed for his forgiveness and Weed accepts but Jerome is still skeptical. When Rocket says there are fifty possible comrades over the mountains in Shiga, Jerome leads the way. A bad storm comes in and blows GB off a cliff along with Weed who tries to help. The dogs think Rocket set them up but he risks his life to pull GB and Weed back to saftey off from the cliff ledge. Jerome saves Rocket and lets him lead the way.

The day John is killed by Hougen, Rocket finds out his brothers were killed so he started howling and the rest of Ou's pack joined in howling for their losses but strengthening their comradship. Rocket gets kidnapped when he and the Ou pack go to his home town. Stone's group beats him up.