Matsukiyo
Matsukiyo (Matsukiyo; Bootleg: Sungki) is a friend of Shigeki who appears in both Keitai Denjuu Telefang: Speed and Keitai Denjuu Telefang: Power. He is the only human character to appear in both Telefang 1 and Telefang 2.
He is something of a child genius, and deeply interested in the Denjuu World, which he had never visited before. After he and Shigeki accidentally arrive there via the D-Shot that Shigeki picked up, Matsukiyo stays with Musa in Toronko Village and gives Shigeki advice during the course of the story.
In Telefang 2, Matsukiyo appears as an adult scientist living in the Human World. He is friends with Kyou and Midori, giving them a map and D-Shot so that they can travel the Denjuu World and find their fathers. He offers rewards through the D-Shot's Wanted application, in exchange for information on specific Denjuu. He also rewards the player with a certificate if the Denjuu Index is completed.
Matsukiyo is never encountered as a T-Fanger, however there is a set of battle sprites for him in the ROM image data.
In the manga
Telefang 1
In the Telefang 1 manga, Matsukiyo takes a much more active role than in the games, exploring the Denjuu World with Shigeki. He befriends a Waratah in Toronko Village, which becomes his partner Denjuu. There are also a series of 4-koma featuring Matsukiyo in volume 3 of the collected set.
Telefang 2
Matsukiyo also appears in the Telefang 2 manga.