What original character did the mercenary replace in the tempest?
a) a horse
b) a fiddler
c) a second women
d) a small boy

The original character that the mercenary replace in the tempest is:
b) a fiddler
The mercenary used the identity of the fiddler as his disguise. He was able to get close to his targets without being noticed. He was already skilled in playing musical instruments, so it was not difficult for him to take the role of a fiddler in disguise in order to complete his contract.