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The Fallen Angel is an entity found currently only in Level 252.
They are neutral entities, and usually roam around or fly around. When provoked through weapons or threats, they may attempt to capture you and drop you from the sky from a high height, resulting to a possible fatal death from falling.
They are tall women humanoid entities, mostly golden and white in color, with big wings, and a variety of hairstyles of different lengths.
Leave them around
Possibly talk to them.
Attempt to kill them.
Threaten them.