Astral is apart of 2 animatics using an audio from Regular show and Strange Hill High: 

Animatic 1: https://youtu.be/mE-wJjEeyYQ?si=DsflWnXIsH_ry-Ns

Animatic 2: https://www.youtube.com/watch?v=5-EGklvQGiU&list=PLxPxJ8arq-44pttOsv7G4yNTset74oOd1&index=43

Astral is a 17 year old galaxy character, sort of like Alien X from Ben 10. I don't have a headcanon voice for her so feel free to go with any voice you like, but I do have a headcanon for her sort of delivery tone which is Templeton from Strange Hill High. She's also chaotic neutral if that helps. https://www.youtube.com/watch?v=rvaJXUlay5Q