Because you like First Doctor in Doctor Who
If you need her, Lisa Simpson will be in her room with her saxophone and a good book. See them in The Simpsons.
Even the smallest person can change the course of the world, if he's brave enough. See them in The Lord of the Rings.
Aragorn is the one true king, a title he is too humble to accept. See them in The Lord of the Rings.
A wildly brilliant detective, Sherlock Holmes can figure out everything except how to interact with other human beings. See them in Sherlock.
Nothing instills more fear in the Empire than the deep kshhh of Darth Vader breathing through his helmet. See them in Star Wars Series.
Carl Fredricksen is a crotchety old man who may just have it in him to take one last, great adventure. See them in Up.
Billionaire playboy by day and vigilante archer by night, Oliver Queen aims to rid Starling City of crime and atone for his past mistakes. See them in DC Extended Universe.
Puss In Boots is a suave, honorable ladies man/cat who's not above playing cute to get you to let down your guard. See them in Shrek 2.
Brilliant, violent, and only a little insane, the Joker doesn't listen to anyone except the voices in his head. See them in DC Extended Universe.
With great power comes great responsibility, but Peter Parker always seems to get the short end of that bargain. See them in Marvel Cinematic Universe.
Castiel might be an immortal angel, but the human world is still more than a little confusing. See them in Supernatural.