Animated stickers/Emotes created in Live2D. Live2D hybridizes 3D rigging and 2D drawings. To create one, you "rig" a 2D drawing's parts, setting parameters and deformers for individualized pieces such as the hair, the hands, the arms, the head, the eyes, etc, similarly to how you would make a cut up animated piece in After effects. The difference between AE and Live2D is the rigging, each piece is retopoed and meshed for deforming when setting parameters. It is a little more complex but very fun to do. Some pieces are a little more successful than others.
All of these were made for Twitch Streamers.