The Cast

B'Elanna and K'Ehleyr Torres are twin sisters, they're identical twins except in some physical features and their attitudes, K'Ehleyr is more level headed than her sister.
Unlike B'Elanna, K'Ehleyr graduated from the Academy and became a Starfleet officer.
K'Ehleyr is stationed on Voyager as the Second Officer when she meets Tom Paris who's an observer while Voyager looks for the Maquis when things go all wrong, Voyager gets stuck 70,000 light years from home, K'Ehleyr reunites with B'Elanna after three years of not seeing her, then things get harder as K'Ehleyr falls in love with Tom Paris, but is too scared to admit it.

Disclaimer: I only own K'Ehleyr Torres and any other OC's present. Cover to be added.