Tomboy

A tomboy is a girl with a rather masculine personality. Common characteristics are wearing typically male clothing and loving video games. Compare it to femboy, a boy with a feminine personality.

Examples
Bold indicates that I invented the character and/or media.

Literature

 * Arya Stark from A Song of Ice and Fire (also the Game of Thrones TV series)
 * Caroline from Club Hour 
 * Cassie Mifsud from Oliver Galaxy 
 * Corva Roedder and Sharon from Titan Troop
 * Jo March from Little Women
 * Luna Lovegood from Harry Potter (also the Warner Bros films)

Films

 * Gogo from Big Hero 6 
 * Jessie from Toy Story 
 * Judy Hopps from Zootopia 
 * Rita from Oliver & Company 
 * Strelka from Space Dogs 
 * Wyldstyle from The Lego Movie

TV

 * Buttercup from The Powerpuff Girls
 * Connie Maheswaran from Steven Universe 
 * Dolly from Dalmatian Street 
 * Kara Tupou from South Park (especially the video game fanfics)
 * Marceline from Adventure Time 
 * Max Mayfield from Stranger Things 
 * Raven from Teen Titans 
 * Sam Manson from Danny Phantom 
 * Webby Vanderquack from DuckTales (2017)

Video games

 * Ashei from The Legend of Zelda: Twilight Princess
 * Bunnie Rabbot from Sonic 
 * Daisy from Super Mario Bros 
 * Ellie from The Last of Us 
 * Kumatora from Earthbound 3 
 * Misty from Pokemon (also the Pokemon cartoon)