A quick pic of Helga in her Valkyrie armour (Which she no longer wears).
She was booted out of Asgard for causing extensive damage to the great hall, Valhalla (How and why has never been explained). As punishment, she can't return until she's paid for the repairs. Catch is; she can only accept money from mortals. As the funds required will probably take 100 lifetimes to accumulate, she'll be at it for a while....unless she can help an employer out in his efforts to take over the world and thus receive a really big bonus......