I'd absolutely love to hear the justification for revenge being "out of character" for Halsey. It really isn't, and those who are saying it is are either completely ignoring what she's done in the past or simply don't know it. First of all, we'll start with her journal. ONI shut down the Spartan-II Program and shut Halsey away in CASTLE Base on Reach, in her journal she states that she was planning on getting [b][u]revenge[/b][/u] against them by refusing their offer to transfer her to New Alexandria so their agents would have to submit themselves to security checks whenever they wanted to talk to her. The fact that she wanted revenge over something that seemed so trivial shows it's absolutely not out of character at all for her to want her shot at payback when she's had to have her whole arm removed to save her life because they ordered her execution, [i]regardless[/i] of whether she's playing Jul or not. Ackerson ringing any bells? She looked for an excuse for ages to get rid of him and her opportunity for [b][u]revenge[/b][/u] was fulfilled when Ackerson tried to hijack the integration of Cortana with John's armour, as she filed an official complaint against him suggesting that he'd suffered a mental breakdown and should be left to rot in a prison for the rest of his life. And for those arguing that 343's presentation of her is nothing like the books, her override of Roland's functions was a clear call-back to when she did the same to Ackerson's AI Araquiel when she used a line of code to access his fail-safe and deactivated him. Absolutely [i]nothing[/i] about Halsey thus-far has been even remotely out of character. She reveals that she wants nothing more than knowledge, to know everything - we see this [i]all the time[/i] in the novels where she becomes frustrated when she can't work something out or is beaten. She keeps information to herself, she holds admiration for her Spartans and disdain for the new 'models' (as she did in Ghosts of Onyx when she constantly scrutinised the Spartan-IIIs and in Reach where she criticised Noble Team). Nothing about Halsey herself has changed, what has changed is the perception that other characters have towards her. The Human-Covenant war is over, she's no longer vital to humanity's survival which means that the actions she's committed are seen in a different light by others. Get this shit in your head, some of you are just spouting utter nonsense.