Miyo
Miyo (Miyo; Bootleg: Miyor) is a friend of Shigeki who appears in both Keitai Denjuu Telefang: Speed and Keitai Denjuu Telefang: Power.
She is a strong-willed girl, and likes to annoy Shigeki by teasing him about how he and Matsukiyo had never visited the Denjuu World. Shigeki later comes across her in Kurinon Village after he defeats her partner, Suguri, while looking for a stolen Antenna Tree key. They meet again on Ion Island, where she asks him to find and recruit Noisy.
Unused battle
There is unused T-Fanger party data in the ROM which suggests the player was meant to be able to battle Miyo at one point. The party consists of a level 8 Suguri and level 7 Pampas, both with an origin location of Toronko Village. In the final game, Miyo's Suguri is battled on its own, and Miyo later instructs the player to recruit a Lampgera friend of hers named Noisy (which could be the evolution of the unused party's Pampas.)
There is no corresponding T-Fanger battle sprite for Miyo, but there is unused data for a T-Fanger named "Girl", whose sprite is a duplicate of another T-Fanger named Miki. This data may have been initially intended as a placeholder used for Miyo. This is plausible since both Nerikara and Dr. Craft have names and battle sprites listed in T-Fanger data, but are not fought at any point.
In the manga
In chapter 2 of the Telefang 1 manga, Miyo joins Shigeki's group after Crypto calls Suguri for help in defeating a Potzal in Fraoula Village.