Very good use of the existing background elements to create this scene - the lion is now attacking the new figure, which has been inserted with subdued colouring, sympathetic to the original painting. And the diagonal rake of the cross makes it appear to be pushed over by the lion.
The scaling has to be very precise because the new figure is inserted between two of those already present in the painting.
Rear views are not very common in crux art, and there is a risk of not seeing enough of the action.
That does not apply here - we can see plenty of action, and we also get to see the girl's face with her fearful expression.
Her right arm is a little ambiguous, and should perhaps conceal more of her head.
But the slightly awkward pose you have produced in this composite figure does contribute to the sense of fear and dread.
Nice scaling and blending - well done, Hammers!