After discovering that all of the remaining floors of the spire are all empty and devoid of the angels that I was looking for, I proceed to continue the climb and reached the second to the last floor to the top. There, sat a big automaton, shaped like an angel but one closer look and you will see that this was not alive.
The mini-boss before the main event. I was expecting it to be here but seeing it here means that it is already existing since the very beginning. According to the lore of the automaton, it was originally an automaton meant to guard the spire against any intruders. However, after the cult leader took over the spire, she rewrite all of the code of the automaton and made it guard the floor, right next to the top floor so that no one else will be able to climb the top floor.