What’s a characteristic of a occluded front

Explanation:  When the two fronts combine, the colder air is pushed beneath the warmer air, resulting in an occluded front that is either characterized as warm or cold, depending on the direction of the occlusion. These fronts are symbolized on a weather map by a purple line with both semicircles and triangles on it.

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.