Pi

Pi is one of the side characters in Lächeln und Regenbogen. Despite their minor role, they play a major part in the story's world, especially with its relationship with Meridian.

Appearance
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Personality
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Backstory
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Relationships
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Trivia

 * Obviously, its entire themes, even their name, are based on the mathematical constant of the same name.
 * Its appearance is based on pie and its various flavors and designs, more specifically for them it's a lemon-blueberry pie with a lattice pie crust design, as a reference to the joke that pi and pie sound alike.
 * It doesn't like jokes that reference the pie-pi homophone, as it thinks the joke is overused.