The Batsugun manual contains information about the pilot who flew Flying Shark, Rom Schneider! This description is for his role in Skull Hornets, the heroes of Batsugun:
His regular job is explorer, so he explored the sky, the seas, and the forests from a young age. This time, he was on an expedition into uninhabited island, which turned out to be the entrance of a secret base. He wandared around and got captured by a soldier. He turned out to be the pilot of a Type-A fighter called "Sky Mirage" only because he said he had flown an airplane.
A retired soldier of the government troop. At the war 30 years ago, he flown a propeller airfighter with complete control, and made a heroic effort where he got the name "Flying Shark". His hobby is treasure hunting (Exploring is a job). He has a habit of nodding the head and mumbling "Wm-hm".
Birthday: February 29, 55 years old
Blood Type: A
Prefer: Japanese dried radish
(There is also a story in the NES manual of Sky Shark)