Because you like Craig Schwartz in Being John Malkovich
L
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L is enigmatic, child-like, and one of the smartest people in the world. See them in Death Note.
Loki
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His murderous megalomania aside, Loki is quite charming. Just don't mention his strapping older brother; he's a tad jealous. See them in Marvel Cinematic Universe.
Hermione Granger
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A bookish know-it-all with a bossy streak, Hermione Granger always stands up for what she believes in. See them in Harry Potter Series.