Almost anything will fit and look good there, just keep it on theme. Don't get another reeper on your arm. Save it for a leg maybe if you really want another, space em out
as said before do as you like your tats so far look beyond badass. but my personal opinion i think a switchblade or like a martini glass would look badass. but thats just me man!!! dude reapers are always sick. do whatever you like your taste is good.
I think something taken from the final scene of Butch Cassidy could be a banger right there but I can’t really tell how big your arm is. Obviously it would be lacking a lot of detail but it’s trad so it doesn’t need to be super detailed
getting tattoos is silly in the first place, get as many reapers as you like!