Taejin was shown to be very stubborn and hot headed, a trait that he passed on to his grandson. He is one of the most powerful characters in the series. He also has a very soft and caring attitude towards people close to him or considered a comrade such as promising Park Il-Pyo's grandfather, Park Il-Tae, he would pass on his efforts of combining Taekkyeon and Re-Taekwondo to his son (he passed it on to his grandson Park Il-Pyo due to him being a fugitive) after his death and when he sent Mori t