Because you like Natasha Romanoff / Black Widow in Marvel Cinematic Universe

Driven, resentful, and ruthless, Mello is an emotional powder keg. It's only a matter of time before he explodes. See them in Death Note.

Kagami Hiiragi keeps her grades up, helps at Takanomiya Shrine, serves as class president, and hangs out with her friends. See them in Lucky Star.

Frank Reynolds is too gross even for the prostitutes he hires. See them in It's Always Sunny in Philadelphia .

Because of Miles Edgeworth, the truth will always make itself known. See them in Ace Attorney Series .

An alien, a time-traveler, and an esper are following Haruhi Suzumiya, who – unknown to herself – is a near-omnipotent reality warper. See them in The Melancholy of Haruhi Suzumiya.

Trevor Phillips is an unpredictable maniac who tortures people for no reason. See them in Grand Theft Series.

Years of brutal winters, foreign invasions, and crippling loneliness have left Russia's mental state far from wholly intact. See them in Axis Powers Hetalia.

After having his mind altered after a bad breakup, Joel Barish is not convinced that ignorance is bliss. See them in Eternal Sunshine of the Spotless Mind.

There are a lot of rules in their society for women like Emily Dickinson. But Emily is a rule-breaker. See them in Dickinson.

Some of Cassie Howard’s friends are dealing with drug addictions, but Cassie has another addition that is just as damaging: her addition to love. See them in Euphoria.

Basil Hallward is dominated, soul, brain, and power by Dorian. See them in Dorian Gray.

Years of being the less desirable Vargas sibling have given Romano quite an inferiority complex, as well as the temper to match. See them in Axis Powers Hetalia.