- This article is about the character. For the series as a whole, see Otaku-Ball (series).
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The Otaku-Ball (オタクボール, Otakubōru) is the lead character of the Otaku-Ball series.
The Otaku-Ball is a large spherical robot whom with assistant Taro specializes as a galactic demolition expert, destroying space junk that has formed into rectangular cubes and entered the atmospheres of various locations.