1F62A (sleepy face)

1F629 (weary face)

tracker:12
iemoji

weary/sleepy/tired

'weary' could be bored or exhausted, neither implying desire to sleep

changed from 'anguished'

Circular, Droopy Eyebrows, Black Circle Upper-SemiCircular [Droopy Eyebrows], [Upper Semicircular Mouth]

1F628 (fearful face)

fear is one of the Inside Out emotions

big wide round eyes express it best

vulnerable = upslanted eyebrows:
/   \
 O O
  O
round open mouth better than frown?
hair standing on end
cold sweat?

followed by running, puff

1F627 (anguished face)

google thinks this usually involves head in hands, closed eyes

1F626 (frowning face with open mouth)

cf

1F625 (disappointed but relieved face)

glad it's over
didn't win, but could have been worse

1F624 (face with look of triumph)

"look of triumph"???
i would have guessed a bull about to charge, or McCloud's "anger + joy = cruelty"

cf nose-in-air (profile?), McCloud's 'disdain' (intensity-1 disgust), wrinkled nose

"A face with closed eyes, stern mouth, and visible breath coming out of the nose. This emoji just accomplished something." [cite]

[pdf]

why frowning not smiling????

i can picture this snort-of-pride as more japanese than western

western triumph is a strutting rooster with inflated chest
(cf 'chuffed'??)

causes:

may be followed by crash