Mika Samuels, character on TV's "The Walking Dead"
MikaGrainger, character on British TV series "Waterloo Road"
Mika Ahonen, character in anime/manga "Strike Witches"
Rainbow "R." Mika, character in the Street Fighter video game series
Mika Jougasaki, character in THE iDOLM@STER CINDERELLA GIRLS video game
Mika Kujiin, one of the main characters in the Kanamemo anime/manga
Mika Nogizaka, character in the light novel and anime Nogizaka Haruka No Himitsu
Mika Shimotsuki, character in anime Psycho-Pass
Mikazuki "Mika" Augus, character in Mobile Suit Gundam: Iron Blooded Orphans
Mika Returna, character in Under Night In-Birth
Variation of Mieke, a Dutch diminutive of Maria