Zefiris is up for whatever, but I am woefully out of ideas for exactly what.
Perhaps the two could work together (and possibly tying in with Myre as Vader's apprentice) compile a information database on Niflheim. Sal has his surveillance cameras in Emptiness, as did L, so why can't Asgard have some of their own? It'd be good, not too antagonistic to Asgardian sensibilities.
For anything else, she'd be fine working on it, preferably in a less conspicuous role. Her ties in Asgard aren't particularly strong with anyone, and she's beginning to think that cultivating trust over the long run may not be as productive as a less-popular/more-proactive stance.