the tin wood man is one of my favourite characters out of all them, all the poor guy wants is a heart and is very sad most of the timeš, when Dorothy and the scarecrow come across him he is rusted to the bone and cant move one bit! in the film he is always very sad and can struggle to pick himself up and keep on going, this is because of his horrible backstory/upbringing, to cut in down a bit he was once a casual normal human but he had a axe that was enchanted by a very evil witch and that curse resolved in him cutting of each of his limbs one by one.
luckily a local metal worker was somehow big brain enough to build him back together with tin and formed the great tin wood man!