He wields a pickaxe and actually hates ken since he seems to get all the women. He is known for having short lived crushes.
He earned the nickname "pickaxe" after he was caught having sex with a farmers wife. That farmer tried to kill Sang with a pickaxe.
He appears to dislike Ken since the latter earned miss yoo's love who pickaxe had a crush on. During the training arc Pickaxe tried to hurt Ken with a rock to become boss himself but his plans falls through. He is very fickle with his feelings towards women, he is seen often changing his target of affections but will hit on any girl really.
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