...given the look of things, Gaspard might go for an outing into the StarCraft verse to help untangle some crossovers. The problem lies with one race that inhabits the canon verse: the Protoss. The vast majority of them share an empathic link, some sort of collective consciousness called the Khala. Within it, they can share thoughts and memories with other Protoss. When immersed in the Khala, no Protoss can lie to another and when they die, their last thoughts pass into the link, allowing others to gain their knowledge.

My question is this: how can we erase the memories of the crossed canon characters from this sort of situation? Simply neuralyzing all those present won't work as the memories of, say, a Sangheili or a UNSC Marine would still be engrained in the collective consciousness. Aside from disentangling the entire thing before the Nanoha/Haloverse/Mass Effect/whatever guys meet the Protoss (and skipping out on some charges), how could we go about cleaning that up?

I have a quick solution in the form of a High Templar agent who has been given the uncanonical power to erase thoughts from the Khala in his badfic of origin. I'm debating whether to use him or not because I think this is too Deus ex machina-y for the setting.

Any thoughts?

Did you get Permission? If not, you shouldn't be writing PPC missions.

To answer your question, though, the standard rules of engagement apply: don't, if you can avoid it. The agents' SEP fields should protect them from notice by any canon character, including an A.I., providing they don't make themselves too obvious. In circumstances where the badfic makes the A.I.'s notice impossible to avoid, however, either the canon snapping back into place will remove the non-canon memories, or somebody from DoSAT can probably manually rewrite it.

When deciding how to handle a situation, the best answer is whatever is a) the funniest and/or b) the most growth- and development-inducing for your characters.

~Neshomeh