Ricohet? Psh. Gun goes "bang," thing goes "*gets shot*" and probably dies. Unless it's a yukkuri, in which case you didn't need that entire section of your insides that the bullet just tunneled through anyway.
I don't think the shot ricochet'd here, it just the author failing at angles and heights, not making the hand higher and the "getting shot action lines" be in diagonal.
Plus what remains behind the Marisa is dirt, which usually cushion bullet shots completely (kinda why it becomes such a big deal in that movie "Tremors".)