Phenolo-Phi, also called Phen, is part of Oziron Rael’s crew of Micronauts. A rebel and thrill-seeker, Phen uses a prototype Space Glider suit and pack, with her own modifications, that turns her into a one-woman stealth fighter. Phen is much more concerned about the Micronauts' bottom line than the rest of her crew, frustrated when Oz's moral righteousness interferes with them getting their pay. She prefers to stay out of other people's conflicts and focuses on getting the job done.
After flying into the Cloud, the Micronauts were attacked by Reptos, a race of beings previously thought destroyed by the cloud. Phen helped Oz Rael and Larissa fight off the Reptos until the crew was saved by the mysterious Time Traveler. While the rest of the crew remained mystified as the Time Traveler disappeared, Phen worried about getting the ship flying again.
Several days into their journey, while tracking a mysterious energy source, the Micronauts received a message from Baron Karza. Karza told them that though it had only been a few days for them inside the storm, years had passed for him after he followed them into the cloud. The Micronauts soon arrived at the location of the energy source, or as Karza called it, the birthplace of Microspace: the body of Micronus Prime. Phen questioned how Karza could have spent years in the Cloud when they saw him a few days ago, with Karza explaining how time flows differently in the Cloud. When Karza told the crew that Microspace needed them to save it, she asked Oz what they should do.
Upon flying through the spacebridge to Autobot City, Phen questioned how they were supposed to communicate with any of the inhabitants of this universe, especially if they were made of metal like Acroyear posited. Oz told them to be ready for anything... even what appeared to be a giant robot built by Baron Karza.
The ensuing battle between the ninja and the tiny aliens drew the attention of Arcee, who joined the fight. They were cut short by Optimus Prime, Soundwave, and Windblade, Soundwave creating a shockwave to forcibly pacify the combatants. Windblade recognized the Micronauts from her own journey into Microspace. The visiting Rom - responsible for the Ore-13 explosion - apologized to the tiny visitors for his actions; though unable to understand his language, the Micronauts decided they liked the Space Knight. When Miles Mayhem, supported by the forces of M.A.S.K. and the Dire Wraiths, laid siege to Autobot City, the Micronauts, aboard their vessel, joined the fight.
Faced with a gigantic, dimensionally-displaced Karza, the Micronauts joined up with Soundwave, Rom, Mainframe, and Matt Trakker, Enerchanging with Metrotitan's spacebridge and allowing the other heroes to force the Baron back into Microspace. The Micronauts survived the explosion that marked the Baron's defeat, but awoke later on to find that they had been captured by human scientists.
Some time later, the Micronauts encountered Kup and Garrison Blackrock at the Pacific Science Center in Seattle, believing they might know something about the mysterious "Talisman". Though still jumpy from their recent escapades, Kup managed to ease tensions by using the universal greeting to communicate with Biotron. Larissa realized that she knew the device from somewhere; using the Heliopolis's sensors, the team of Micronauts and Cybertronians tracked the Talisman to the Moon, where they encountered Action Man being held hostage by Baron Ironblood and Doctor X. The heroes managed to see off the villains and retrieve the Talisman, and the Micronauts returned to Earth.
- Phenolo-Phi at the TFWiki