More for personal reference but hey look a guide to NBJB angel wing emotes:
Trembling - tired, stressed
Twitching - slight indication of many emotions
Twisting - stronger emotions
Drooping - relaxed
Pooling or dropping completely out of shape - completely relaxed, asleep
Tucking a wing round someone - possessive, affectionate
Vibrating - very happy
Hiking up - defensive, distressed
Pulled tight against back - practicality for sparring, alternatively: combined with dimming of the colour indicates embarrassment or shame
Flaring - aggressive or showing off, surprise
Flicking the tips - amusement/interest
'Fluffing up' - the wing filaments become thicker and glow brighter. Indicates contentment, happiness, comfort, pride
Sharpening into flat rays - aggressive, will stab, 'leave me alone'
Quivering - uncertainty, pleasure - depends on context
Curling - general strong reaction to something
Fluttering - general happiness, "pleased to see you"
And of course since Mal is awkward and complicated, Mal-specific emoting:
Humming - acknowledgement
Trilling - happiness
Twitching wings - thinking heavily about things
Twisting wings - worried, concerned
Fluffing up - specifically pride for him
