bruuuh, took me a minute to realize that was juniper xD great job on the designs and the animation works really well. the one thing I'd say is try to make everything further from your subject darker and less detailed. you want your main focus to be in the middle so the further you go away the darker it gets and the less details you try to convey, that way you avoid making the piece noisy. this can also apply to the subject itself, anything in the back should be darker and less detailed (for example the legs in your piece as they shift to the back). as for highlights, try to use them sparingly so that they're more effective.

An improvement could definitely be made on the background. Right now it snaps a lot, and the depth of the tunnel could be conveyed better by making the farther background darker. The animation of Diablo and Juniper is very good! The style complements the comedic nature of the work perfectly!