The expected place of the angel's advent was 'above Youngdungpo Station'. In fact, it was never specifically stated, but the Liberation Guild speculated like that.
"If the angel comes down to judge us, she will come down where we are because we can't escape Seoul anyway."
Like Minhum said, it was unlikely that the Absolute Race would secretly descend in a corner of Seoul then sneak up to them to attempt an assassination.
The core fighters of the Liberation Guild began responding based on such speculation, and soon, Youngdungpo Station became noisy with them preparing for the defense.
"Large vehicles are coming in! Please move away!"
"Place the water tanks right here!"
Junghoon and Minhum, who were standing on the rooftop of the station, were looking down at all the preparations. They were preparing in unison, and the leaders of each team came up and briefed them about the progress of their preparations.
The first one to report was the supply team leader.