I already beated him a few times and he does indeed control people, apparently it is counted as mind control rather than hypnosis cause the female mc tried to talk with the victims and their minds were wandering, but unfortunately he never tries to attack the player with his power, even if hes about to be arrested he doesnt try to use his power against the female mc.
my theory is that since the skill icon of "hypnosis resistance" have a pendulum, the creator might add new enemies or boss that directly uses this, im not sure why the first boss doesnt attack the player but I guess it will be explained when we have a better translation, cause i couldnt understand well how the first boss power worked.