Because you like Maggie Hart in True Detective Season 1
Castiel
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Castiel might be an immortal angel, but the human world is still more than a little confusing. See them in Supernatural.
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.