Areiel is an elite Forsaken in Northrend if I recall my questing correctly.
How she has got anything to do with Shandris is puzzling at best.
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This story about her shredding up animals due to disappointment is an integral part of he character and it is completely unobjective to say that's not something she would do or that it is OOC. You have to deal with what a character is and has done, even if it is not to your liking. Her doing that is all her and it is very much IC of her as the writers determine what is IC or not. There's a lot of stuff I don't like about how they wrote characters, but that doesn't make them "very OOC" for them.
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It is getting incredibly obvious how Blizzard seems to be unable to come up with any relevant male characters whatsoever. I don't know whether they're trying to catter to social norms in the US or whether it is due to the authors they pick, but it is incredibly obvious at this point.
The stories of female characters that were always an integral part of WoW's and Warcraft's story in general have been handled in an - at best - very dubious way so far. Jaina becomes Lord Admiral after all she's done? Voss fights for the Forsaken? Garrona out for Wrynn blood? Alleria turns into a vessel of the void? Sylvanas, who is so scared of death and best rules from the shadows, starts the biggest war since the Second War and in the process puts herself at a greater risk of getting killed off for good than ever before.