Blue's birthday is may 2

The Fighting Stick Figures are actually natural stick figures who were abducted from the Outernet, had their memories wiped and their physical ages paused (preventing them from aging), and placed in the Stick Figures Fighting app.

(Actually, is there even a canonical origin story for the FSFs?)

Yellow has ASD (autism spectrum disorder)

No @The Slimy Stump I Dont Think So

TSC has narcolepsy >:)