170 and is an authority on mechanics. She is a university-graduated girl at the age of 16 years. She has trouble talking to boys, as she can be quite shy around them. She has a mild crush on Takumi. Karen also enjoys writing letters to her older brother who works just outside the base as an architect and loves him very much. Elise is the youngest pilot of the Sonic Diver Unit. She is the sole survivor after the WORMs destroyed the West Europe base. Traumatized by that disaster, she suffers initial problems integrating into the Sky Girls unit, especially with Eika because of her "selfish brat" attitude. When she joins the team, her overall ability as Sonic Driver pilot is very good, although not as good as Eika. She flies the only mass-produced Sonic Diver unit built before WORMS destroyed the manufacturing facility. She was briefly seen in episode 6 of the television series, and is formally introduced in episode 11. A mysterious, shy and emotionless girl of Indian origin whose late father conducted scientific work on nanotechnology connected to the origins of the WORMs. She has shown limited 'remote control' of the WORMs, as seen in the episode 20. At first, everyone feared her because her emotionless personality, Otoha being the only one who was very nice to her. Near the end of the series she becomes the fifth Sky Girl, and pilots the Sonic Diver Shunya. Secondary characters A former skilled combat pilot, he protected Zin Hizaki from a WORM's attack and injured his hands in the previous war against the WORMs and can no longer fly. Now he commands the 13th Aviation Corp (the Sonic Diver squadron). Eika is the squadron leader and his subordinate. His duties mostly revolve around training the pilots, relaying their orders from above and making sure the unit's needs are met. He is the only member aboard the Koryu that does not wear a traditional uniform. Instead he wears an old leather flight jacket with a winged skull on the back, a white shirt, and blue jeans. He also enjoys fishing (although he never catches anything). Although the three pilots see him as a non-sensitive man he actually really cares about them. The reason he is strict and stern to them is for their own good as pilots who drive unusual combat weapon. A quiet and secretive officer in charge of