Because you like Terence Fletcher in Whiplash
What Mako Mankanshoku lacks in common sense, she makes up for in sheer optimism and force of personality. See them in Kill la Kill.
Kyoya Ootori is possibly the only person who could reasonably go from VP of a school club to ruling the world. See them in Ouran High School Host Club.
An off-beat dork, John Egbert is funny, inventive, and endlessly optimistic. See them in Homestuck.
The vampire that killed Zero Kiryu's family also infected him, and he starts to crave blood, much to his horror. See them in Vampire Knight.
Villanelle is a hired assassin who loves committing murder as much as she loves dressing up in fancy pink ballgowns. See them in Killing Eve.
Because of Miles Edgeworth, the truth will always make itself known. See them in Ace Attorney Series .