I think that if I had to pick, it would be a queen also...just from her association with the queen as you mentioned. Yeah, we could all probably afford a life.

I think I would go queen/hive
There is something very maidenly in the first stanza talking about crossing a bridge in a sundress, summery with no protection.
Then being bundled for her own protection by worldly people of affairs, armored in white, compared to the hive - the white hive that is white and 'snug' as she has been bundled to be. VIrgin as she was when she crossed the bridge, self contained Multiple uses of white.
Then a flurry of disorienting action, a magicians girl, the virgin sacrifice, wanting to please in spite of fear and wanting to run.
Do you think she refers to herself in speaking of the old queen as well? She has been dressed by others in the face of her unpreparedness yet doesn't trust them or belong. Scrutinized. An insider, and an outsider.
I wouldn't go Tarot at all on this one, unless it was in relation to her other poems, but other than that I'm not feelin it.
Here here for Plath addicts.