>>98854524I think Jasper's interesting because she's tragic, has depth to her flaws, faces heavy consequences, and got an arc with cool themes that gave her complexity more subtly than some other characters.
She was made from a crappy kindergarten that only produced off colors with the purpose of being used as cannon fodder in the war for Earth. Despite that she gained a reputation during the war as "the kindergarten quartz that could" and became an exception among the Betas and other Earthlings, which is why she's now a part of Yellow's army but the rest are stashed away at the zoo. This puts higher expectations on her, and because Earth is now hated by homeworld and she was separated from the other Earth gems, she is lonely and very critical of herself.
Since the war for Earth was lost and she lost her diamond, she essentially failed her life's purpose, so she feels defined by being a failure from Earth and isn't secure in her worth, and she obsesses with perfection and proving her superiority to compensate for this. Serving Yellow and placing all her value in her admired fighting abilities was her attempt at regaining self worth, but when she comes back to Earth to prove herself and get revenge on Rose for taking everything from her and killing Pink, she only continues to fail, and that along with her new fusion issues is what leads to her hitting rock bottom when she accepts that she's worthless and lets herself get corrupted.
Earthlings highlights how she causes a lot of her own problems but she's also a victim to circumstance, she's a bully but she's really insecure and vulnerable, and she acts arrogant to hide how she hates herself. Alone at Sea highlights the way she acts independent to hide how she's lonely and dependent on others to make her feel less insecure, as well as her growing desperation to feel less worthless and have companionship when she starts wanting to go back to being used as someone's punching bag in a harmful relationship.