Because you like Karl Heisenberg in Resident Evil Series
A few millennia in the mortal realm have caused DEATH to be quite enamored of life. See them in Discworld.
Peter Venkman's "research" projects are designed to get undergraduate students to sleep with him. Though it turns out he can bust ghosts. See them in Ghostbusters.
Phoebe Halliwell is a bestselling author and martial arts master with power of premonitions. See them in Charmed.
R2-D2 has been in the galaxy saving business for decades. Not bad for somebody whose vocabulary is limited to "beep-boop." See them in Star Wars Series.
Dr. Gordon Freeman is a brilliant physicist is a quiet hero. And given all the violent aliens, he better be. See them in Half-Life.
Khan Noonien Singh is super strong, super smart, and out for revenge. He always seems to be two steps ahead of his enemies. See them in Star Trek Into Darkness.
Though seemingly caring and calm, this motel owner has a mysterious streak of intensity. See them in Psycho.
Sarcastic and always complaining, C3PO is a droid that despite his quirks you always want by your side. See them in Star Wars Series.
David Rose likes his rose chilled, his linens pressed, and his family quiet. See them in Schitt's Creek.
Red doesn't like to explain herself. She wants her work to do the talking. See them in Transistor.
Wei Shen is an undercover cop on a mission for justice (or at least vengeance). See them in Sleeping Dogs.
