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Oh wait, I know. Pained would partially represent what Ana's death WOULD have meant if she hadn't been alive and ran off to let everyone else pick up the pieces(....like Jack), except Jaina and Pained were closer than Lena and Ana. Hardly a perfect comparison given the circumstances between Pained's death and Ana's 'death' are so wildly incompatible, but it's more fitting than equating with the Alleria route(The one who went Void) since they never met, and Veressa is both alive, and loyal to Jaina, so she 100% doesn't fit.
Unless Blizz decides to clue us in to Lena's previous military service(Which I HOPE she has) or childhood friends, it's the only comparison my tiredfogged mind can conjure this late/early.