She was poorly definined, kinda unintersting, and as a result the writers had no clue what to do with her.
Considering she's KINDA POP's ManAtArms, she's just a mess. It's all bound up with the same discussion we had about why Glimmer, the "Leader of the Rebellion" and heir to Brightmoon was INSTANTLY and COMPLETELY overshadowed by turncoat Horde-Captain Adora as soon as she joined up.
While I agree with the prevailing opinion that POP was better written than MOTU, in this regard, the whole conceit about Adora being a redeemed villian, while insanely cool and interesting, was just sooooo poorly executed.
There's a really uncomfortable tension between the cartoon-logic set up (She-Ra as heroine plus supporting cast) and the heavily-developed backstory (Adora as Horde Captain, Glimmer and Angella as oppressed royalty) It's all very cool, but they don't work very well together sometimes.