Arashi meets Penne in episode 5, after the events in that episode, Penne joins Team Freedom. Penne importantly re-names the team to be "Freedom" and designs the logo. A substantial improvement over Arashi's attempts at a name/logo for the team the episode prior.

Penne has a sordid background. Her parents were killed when she was young by a group of bandits. This forced her to flee into an orphanage with her Scorpear. Being able to ride Zoids, she took up bounty hunting. She was quite successful, even capturing the Bandits that had attacked her parents. Eventually, she hears of the Death Metal Empire that were seeking the Wild Liger. She teams up with Arashi to gain his trust and planned to double-cross him for the reward.

She nearly succeeds, but gives up and instead double-crosses Foiegras, one of the Four Heavenly Kings of Death Metal. It's not until after turning on Death Metal, does the Scorpear bestow her with its Zoid Key.