The woman in the picture has short brown hair,yet we see claire with long red hair just a few secondes earlier.
I really don't think its claire.
2 options, 1 ada. The other one doesn't exist since leon isn't connected with any S.T.A.R.S. member, so she can't be rebecca, she doesn't even know him
claire is not since she's fully shown with the trolley, maybe ada
but no one except ada can be featured near leon, no one else
, it's the game who taught us that some characters are shown only with some particular characters, not them all