Somehow I think the blue roses are the clue...the need to "improve" on nature. Here begins the long, slow corruption of youth and beauty, and physical nature. A little girl holding a bouquet of flowers: what could be more natural and innocent? Our eyes are drawn to her rather sweet face, but also prominent in the picture are those blue roses, such as nature never made. Soon this girl will be stuffed into a corset and tight shoes, to "improve" her figure; her hair will be crimped and waved and piled on top of her head against gravity; she will be taught to walk a certain unnatural way "like a lady", if the shoes don't make that happen automatically; to eat thus and so but not too much, and certainly none of ______; to smile, but not show her teeth; to laugh on cue, but not too loud; to mould herself into a form and manner pleasing to others, without reference to herself; to keep up an appropriate performance once she has "come out" into society; to make an "appropriate" marriage which may have nothing to do with her inclination...just like her mother, the Queen of Pentacles...the list goes on, I'm sure you are getting the idea! And on it goes throughout her life, until she ends up in the family mausoleum which she is perhaps standing in front of, enbalmed, and decay forestalled; unable to return to the earth from whence she and the flowers sprang, but locked in stone presumably for all time. Deliberately deformed body preserved, but spirit long since dwindled away, perhaps starting shortly after this picture was taken.... Oh, it's not the child herself that I mistrust!
Or: her pale, cut-out appearance that doesn't seem to allow enough room for her not to hit the wall, given how close to it she's standing: she's not actually there. Her body is in the mausoleum, and this is the ghost of the child she was all that time ago, in her Regency dress, when her spirit and soul were still pretty much hers...the photo was taken a little over a lifetime later...with all the foregoing having come to pass in the meantime.
I am getting a much better idea of what this card may represent!