This is the recently restored Loki Laufeyson, affectionately known as Lady Loki. (In truth, Loki is borrowing Sif’s body in an effort to convince all of Asgard that he- ahem, she has changed her ways and is now a pillar of truth. This is, of course, an elaborate con.)
We found her dining with Doctor Doom, but could get no information from her before her poisoned wine put us in the hospital.
She sent us a Hallmark card and a box of chocolates.