Nobody cared who they were until they took off the mask.
-Very long, curly eyelashes.
-Gold-colored cat eyes.
-They glow in the dark.
-2 good-luck piercings.
As an interesting note, the name in this concept art is not “鉄獣戦線 凶鳥のシュライグ” (Tribrigade Shrike the Wicked Wings), but “鉄獣戦線 片翼のシュライグ” (Tribrigade Shrike the One-Winged, replacing “凶鳥”, wicked bird, for “片翼”, one-winged)
-Rough sketch for the Tribrigade mark/emblem. -> Simplified form.
-The mark/emblem is attached to their clothes or otherwise.
-The commander, heading the army.
-Has a pet mecha-shrike.