[quote=@Meta] It places an awful lot of trust into someone who very much desires to kill Shinji. [/quote] *Raises an eyebrow.* Who says anything about trust? As far as this potential agreement is concerned, both of you are compromising on this issue so that you cooperate to some degree and actually make progress towards a different outcome instead of wasting time and effort. To keep it short, you don't have to trust each other, but that doesn't mean you can't acknowledge and respect each others strength long enough to work together. Worst comes to worst, you help him kill Shinji if he turns into Aeron, and in the best case scenario Shinji lives without Aeron ever becoming a threat.