I think every member of the Taro Troop giants are childlike like Kotaro. The way they attack when you fight them also shows it. It makes me feel bad whenever I have to kill one of them because they really seem like gentle giants who were manipulated into becoming soldiers because of their size and strength. In fact, when you fight the giant shield taro guy (there is one in Senpou temple and one in the second Hirata memory), if you break his shield with the axe, he will stop attacking, start crying and cover in fear. The guys with hammers and bats will also start tantruming if you fight them for a while and you keep hitting them and deflecting (thats when they do the big combo bashing attack).