beta
My personal theory is like Guwon definitely did try to kill the dad, teach too even. but it was while the dad was trying to kill teach, why? Probably because he had an injury or something and was holding him back? So yeah, Guwon just killed the dad and took teach instead.
But then again, maybe he just killed him because he was useless like he did everybody else. After all, if he can lie to the kids he can lie to Teach