What part of he wave is labeled with an A. 1) Amplitude

2) Wavelength

3) Crest

4) Trough

(Never mind I figured out it's wave length)

fumikage isn't really a bird, and tsuyu does have teeth. tsuyu has a transformation quirk which still allows her to be partially human. otherwise we'd have a large frog running around. fumikage has teeth because again, he isn't a bird. his head was a quirk mixture if i'm correct.