Sparrow: Government agent who can fly. She was a supporting character in the Blackwulf comic book, so lots of stuff happened to her there (including having her nervous system replaced with circutry). I'm including her because I like her costume.
Stealth: Mercenary who can fly and is invisible to radar.
Streetman: Freelance spy with super-hearing. Hey, what else are you going to do with super-hearing but eavesdrop?
Sapphire Styx: Mercenary life-force vampire. She looks like a Milton Caniff character.
Sycamore: Giant tree dude.