"Luka," song by SuzanneVega about child abuse
Dr. Luka Kovac, character on TV's ER
Luka Macken, character in anime "Kuroshitsuji / BlackButler PrinceLuka, character in the "Dragon Slippers" book series
LukaMartin, character on TV's "The Vampire Diaries"
Luka Redgrave, character in the video game series "Bayonetta"
Luka, character in manga/anime Uragiri wa Boku no Namae o Shitteiru
Luka Megurine, female vocaloid