That isn't her hand that is Jake Muller's hand, if you check some of the character pictures you can see he is wearing those type of fingerless gloves which would make me suspect that it is him examining her wound.
Also as someone else said it looks like the hood of her jacket so would suggest she is laying on the ground injured and being attended to which would make it more likely to be Jake or possibly Leon/Helena although I suspect it happens before they meet up with each other.
Also as someone else said it looks like the hood of her jacket so would suggest she is laying on the ground injured and being attended to which would make it more likely to be Jake or possibly Leon/Helena although I suspect it happens before they meet up with each other.