Man, I got totally hooked on 'Love in Sky' last month, and honestly, the characters are what sold it for me. The central figure is definitely Stella, this incredibly driven yet emotionally closed-off pilot trying to make it in a male-dominated field. Her dynamic with Leo, her charming but sometimes infuriatingly laid-back co-pilot and love interest, drives most of the plot. He's the one constantly pushing her to loosen up and see the bigger picture beyond just professional success.
Then there's Captain Vance, their stern but secretly supportive mentor who has this whole tragic backstory involving a past crash. He adds a layer of gravity and history to the airline setting. You can't forget Mira either, Stella's sharp-tongued best friend and a genius aircraft mechanic who provides most of the comic relief and blunt truths. The antagonist is mostly internal—Stella's own fears and past failures—but there's a corporate rival, a slimy executive named Finn, who creates some external conflict trying to sabotage their airline's new route bid. The interplay between their professional ambitions and personal hang-ups is really well done.
I always felt Leo's younger sister, who's a budding aerospace engineer, was an underrated character. She only shows up a few times but really highlights the theme of legacy and the next generation taking flight, literally and figuratively.