My Alien vtuber was made with Procreate and edited with Photoshop, then rigged in Live2D for motion tracking. I designed the arms as separate pieces at first, since the Vtube Studio application allows users to add "Items" onto their model, which can have looping frame animations. I edited this model a few times to add more features like the lower teeth, dangling arms, and Potato Mode. I have a handful of scenery and other fun items to use with audience interaction.
Quick showcase of the main features
A showcase of the different movements my model can make, as well as some of the accessories and arm animations I can toggle.
Idle Animation Loop- starts and ends seamlessly. The "drawing arm" and tablet are separate from the character's looping idle animation.

I started with a simple sound reactive talksprite before making a full motion-tracked puppet. https://grifnmore.com/sound-reactive-talksprite/