Because you like Miles "Tails" Prower in Sonic the Hedgehog

Carolos has perfect hair, a lab coat, and a constant readiness to do science. See them in Welcome to Night Vale.

When push comes to shove, the usually overly cautious Luigi has the heart of a hero. See them in Super Mario Bros..

A daughter of a pair of superheroes, Hope van Dyne is scientist is brilliant and fearsome. See them in Marvel Cinematic Universe.

As the Rose Bride, Anthy Himemiya is a spectator in the fencing matches fought over her and her power "to revolutionize the world." See them in Revolutionary Girl Utena.

John Wick is a widowed former Navy Seal who becomes a notoriously effective hitman, killing over 124 people with gunshots alone. See them in John Wick.

Victor Frankenstein can create life, so he's pretty awesome if he says so himself. See them in Frankenstein.

Oscar Jarjayes is a sword-swinging, fearless Commander of the Royal Guard who cross-dresses as a man. See them in Rose of Versailles.

A place as peaceful and enlightened as Piltover has no tolerance for a criminal like Jinx. See them in League of Legends.

Corpse Bride's dreams were taken from her. But now - now she's stolen them from someone else. See them in Corpse Bride.

Squidward Tentacles is a pretentious clarinet player in search of peace and quiet. See them in SpongeBob SquarePants.