CBBC has a cute little kids gameshow titled Raven, where the title shapeshifting host guides a group of ten-to-fourteen-year-olds through a series of sometimes quite gruelling outdoor challenges. Each contestant has a set number of lives, and every time they lost one Raven brought them back with a bit of Conspicuous CG, no harm done. Then came the Spin-Off Series, where contestants had far fewer lives and once "killed", disappeared altogether. That these kids vanished and were never seen again was a bit creepy... but The Dragon's Eye, turned it into Fridge Horror. The contestants vanished as usual, but reappeared in the final week... as a bunch of screaming, savage Feral Children, trapped and destined to wander the Forgotten Kingdom in the shadow of their failure. If they really were meant to be the contestants (BBC Scotland probably just didn't want to employ a bunch of extra child-actorsnote though a YouTube comment claims students from a local school actually played the Feral Children , but they seemed to make a point of focusing on a couple of Ferals who they knew would be recognized) then they had clearly lost it, trapping the surviving contestants (their former allies), threatening and jeering at them, and eventually locking them up probably with no intent of letting them out. This also adds another layer of horror to Raven's enraged reaction to his warrior's imprisonment... those are his former students he's threatening.
The fact that Raven himself was close to being corrupted by the Dragon's Eye (though thankfully resisted and destroyed it) in the last episode. If the spoilered events had gone very differently, who knows how the series would have ended?
One from the normal series: just what exactly happened to that poor person whose skeleton is seen in the Torture Chamber in Series 5 and 6 and how many others were tortured there?
Due to the writers' inability to address whether or not skipping the Crisis on Infinite Earths had anything to do with Raven's instability or not, Raven potentially could remember not one but several retcons in a short term of her own friends and family and them as they originally were. This might explain both her skipping out altogether on prior crises and the inconsistencies in the New 52 take as a means of finally giving into them, in-universe.
At several points Raven's power levels are described as nigh infinite, and Raven herself as nearly unstoppable. If the writers ever wrote an Evil!Raven as credibly destructive as her father, Trigon, she could potentially emerge as an Umar counterpart in canon or an alternate universe.
Said situation has perhaps happened in Injustice: Gods Among Us.
Raven's superhero suit, originally, was just the Azarath monastic robes she saw in Azarath, slightly modified. The New 52 version's eyesore of an outfit was designed by her father, perhaps as a finger in the eye to Azarath and everything it stood for. This would also explain the garish and over the top aspects of the costume.
The nature of her powers makes Raven a unique case of a rationalized Strong As She Needs to Be character. In theory her powers could be anything she wanted, in practice her hangups make achieving this nigh-impossible.