When in Rome...... (characters)

Mari and Lina are polar opposites: Lina is outgoing and fierce while Mari is shy and introvert. Together, they harmoniously balance each other out and are the best of friends. For graduation, they leave Seoul for a trip to Italy, but find themselves lost when they stray from their tour guide. Luckily, they encounter two fellow Koreans, Taemin and Myungsoo, who help them find their way around. They end up taking a liking to these polite (and cute) guys, but there’s more to them than meets the eye: they’re undercover spies working for the CIA! Lina and Mari find themselves in the middle of dangerous criminal cases and covert missions. What will they do when they are forced to become fugitives, traveling from country to country with two guys that they just barely met? And what happens when they start to fall in love with them? Will they ever be able to return to a normal life in Seoul? ( Btw this is a kpop Fanfic but you don't need to know it to follow the story)