Because you like Counselor Deanna Troi in Star Trek: The Next Generation

A compassionate medical student, Martha Jones has found a Doctor she can really look up to. See them in Doctor Who.

On the outside, Gwen seems meek and calm. But she has an inner core of steel. See them in Merlin.

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

This power-hungry Time Lord calls himself the "master of all." Bonus: he has 13 lives. See them in Doctor Who.

Merry Brandybuck is a troublemaking hobbit with a brave streak that some might call foolhardy. See them in The Lord of the Rings.

Nandor is a relentless vampire who never admits he's wrong, loves glitter, and can't use a tablet. See them in What We Do In The Shadows.

Usually the life of the party, Laszlo is now seriously planning the vampiric takeover of the New World. Or at least Staten Island. See them in What We Do In The Shadows.

Introverted Kira Yukimura is sweet, bubbly, and eager to make friends. See them in Teen Wolf.

A no-nonsense pro, Agent K has dedicated his whole life to his job. See them in Men in Black.

Arwen has to choose between a life of loneliness or love and inevitible death, both rather unfortunate options. See them in The Lord of the Rings.

Kara "Starbuck" Thrace will beat you in cards, drink you under the table, then fly circles around you in her fighter plane. See them in Battlestar Galactica.