Prime .vs. Mirror is a fanfic featured around Kristijan and his friends fighting their mirror versions. There is a mirror Voyager named USS Agervoy. One of their mirror versions is an anti-hero; it's Najitsirk, the mirror version of Kristijan. He is an anti-hero but more a villain than a hero. X Mail and Etak are 9 feet tall, but other villains and anti-heroes are the size of their prime universe counterparts.
- Kristijan Matijević:The main protagonist of the serie. He handles mostly his mirror version Najitsirk. He's in a lot of suspicion when seeing Agervoy as the mirror Voyager.
- Panda:Another main protagonist. He handles mostly his mirror version Adnap. He is Kristijan's faithful pet companion and best friend. He's also in this suspicion about the mirror version of Voyager. He has a heart of a wild animal.
- Shirley the Loon:The deuteragonist of the serie. She handles mostly her mirror version Yelrihs. She is Kristijan's pet as well. She is capable of forceful telekinetic powers and is interested in everything about astrology.
- Sally Acorn:Another main deuteragonist. She mostly handles her mirror version Yllas. She is Kristijan's love interest and close friend. She has a portable computer named NICOLE.
- Kate: The tritagonist of the serie. She mostly handles her mirror version Etak. She is Kristijan's close friend and Liam X's love interest. She has a powerful jewel named the Friendship Heart.
- Liam X: Another main tritagonist. He mostly handles his mirror version X Mail. He is Kristijan's friend. He is pretty much capable to fight any enemy.
- Najitsirk: He is the mirror version of Kristijan. Even though he's an anti-hero, he acts more like a villain than a hero. He has a ship named Agervoy, which is the mirror version of Voyager. He had stolen the blueprints for Voyager and after construction named his ship Agervoy.
- Adnap: He is the mirror version of Panda and pet of Najitsirk. Even though he's an anti-hero, he acts more like a hero. He is usually the voice of reason for Najitsirk who mostly doesn't listen to him.
- X Mail: He is the mirror version of Liam X. He has an arm cannon in the place of his left arm and is extremely dangerous.
- Etak: She is the mirror version of Kate. She has claws instead of nails and is extremely dangerous. She is the love interest of X Mail.
- Yelrihs: She is the mirror version of Shirley.
- Yllas: She is the mirror version of Sally. She is the love interest of Najitsirk.