[The paragraph below is a 'detailed description' found in a document left in the L Corp. branch facility located in Nest K.]
...An umbrella that may have been used to stop the rain once. Now, it's too old and worn to perform that role well.
This umbrella must have been the compassion for an abandoned somebody. But it might have come across as hollow.
Hypocrisy, vanity, irresponsibility. Those are the emotions the umbrella has harbored now.

Technology liberation alliance... It is said to be a group of former researchers from various firms.

There may yet be members in the City who we haven't met.

Dongbaek seems to have been the leader of a subgroup.

As they forsook the world… the world will have forsaken them in return.

She has always been good at attracting like-minded individuals and encouraging them, so it must have been a breeze for her to gather the abandoned.

How did they accept her offer, then? I might see the answer to that question.

Her hand would have been comparable to an umbrella in a heavy rain with no shelter to be found, a warm gesture of compassion.

An invitation to comfort and warmth.

...Alas, the umbrella must be a holed one, like the one we are seeing now.

Dongbaek may have held an umbrella over them... It was only a means to further her own interests.

She knows it well herself.

Look. See how she is helplessly caught in the falling rain. She must have no intention of avoiding it.

She is simply showering herself and all others in the rain...

Like a rusted umbrella, it would seem she has chosen to be stained in rust along with everything else.