Court and I would love to run with this path for Steve and Loki!

We need to decide who Loki will shapeshift into but he'll definitely try to get into the vaults as Retha or Marcellus, and upon being caught he'll explain that his intentions were only to help by using the skillset available to him. He will apologise, and attempt to foster a kernel of trust by expressing remorse that his magic is as it is, and that he wasn't blessed with a more "heroic" magical affinity.

Since we have a Strange Presence™ in the mix: he is of course telling tall tales to cover his ass, however there'll be a near imperceptible bitterness to the part about feeling remorse over being what he is that speaks to the truth of it. It isn't actually remorse but more like jealousy and frustration.

Upon feeling the presence I'd like him to see if he can feel a magical anomaly in the immediate area; he expects to be able to get a tingle of wards and sealing spells, so he'd be trying to locate something that doesn't fit with their surroundings.

Steve will then step in and agree to keep an eye on Loki in the Free Cities!