https://youtu.be/XaHCwyLNQ-Y?si=nwF3k57hpFJJ5fyI

1. Umaru was actually modeled after the author's real-life younger sister. She was a beauty in public but a total slob at home. When he told his editor this, they thought it was hilarious and suggested using it as material for a manga.
"Users are shocked to learn that the infamous 'annoying sister' character Umaru-chan was actually a tribute to the author's late sister, which reframes the entire series and explains its sudden, rushed ending."
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