Laughing Mad: Pretty much 99%, if not all he ever says, is laughter, which grows longer and longer as you progress through the game. Lampshaded in Special:
Hee! He! He! He! He! He! He! He! He! He! (repeat)
Malcolm
Species: Human
Planes: Do 335 Pfeil (Aero Fighters 3)
Mao-Mao
Species: Human
Planes: F-15 Eagle (Aero Fighters 1, Aero Fighters 2, Sonic Wings Limited, Sonic Wings Special, & Aero Fighters Assault), Aichi M 6 A 1 Seiran (Aero Fighters 3 & Sonic Wings Special)
A policewoman and idol singer.
Awesome Yet Practical: In Assault, you have to beat the game in order to unlock her (or use a cheat), but she's worth it. She has a "regular" gun, the best missile type (Phoenix), good Chaff, and the NinjaBeam. Her plane is also quite fast, so while it does require a bit of good maneuvering, it is excellent for staging hit-and-run attacks, as well as the defense special missions.
Secret Identity: Nobody knows that she flies in a plane and fights evil.
The first dolphin pilot to have ever lived. He usually shoots out water-themed shots. Since he is a dolphin, he hates dry and hot places.
Difficult, But Awesome: In Assault, his plane is rather slow and has difficulty turning properly. His main gun also has very short range, despite being a laser, meaning he has trouble effectively tailing enemy aircraft. However, that gun does almost as or as much damage as most regular Special Weapons (except the Ninja Beam), and because it's the main gun, it has infite ammo! His plane also has the best missile type (Phoenix), and the Chaff is Air Mines. About the only thing unspectacular in his arsenal is his Special Weapon, the rather cumbersome Fae, which is still good against bosses. This makes Spanky the best boss killer in the game. Makes sense since you have to fully beat the game to unlock him. Or use a cheat. To make him even more awesome, this means the little guy's awesome in the "Air Battle" and "Fortress levels!
Engrish: "I never thought I'd be frying over a jungle."
Extreme Omnivore: He tries to eat Martian food as well as Martians themselves.
T.B. A-10
Species: Robot
Planes: Saab JAS-39 Gripen (Aero Fighters), F-104 Starfighter (Sonic Wings Limited & Sonic Wings Special), Brewster F 2 A Buffalo (Sonic Wings Special)
Villiam
Species: Human
Planes: AV-8 Harrier II (Aero Fighters)
Volk the "No Dead"
Species: Undead
Planes: Kamov Ka-50 Black Shark (Sonic Wings Limited & Sonic Wings Special), Mi G-3 (Sonic Wings Special), Sukhoi Su-35 (Aero Fighters Assault)