Overview
Kurai-san gets her name from "Kurai" (暗い or くらい, "Gloomy") or "Kuro" (黒, "Black"). She always has a notebook with her, in which she records her observations along with the time.
Personality
She has a very gloomy outlook on life. She hates birds due to childhood trauma but loves dogs, including puppies. Her combat power against birds is so high that she can capture Yabai-san, although she gets nosebleeds.
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