Luluko - shy girl, very moe love for her blind crippled little brother. Manipulative bitch mode is hot.
CC - calm, collected innate ace pilot. He's kind of a douchebag. His defining characteristic is scarfing down pizzas and an unhealthy relationship with his cheese-chan doll.
Kallen - hotblooded badass whose ace piloting skills comes from hard work and practice. He's fighting to change the future to the one his dead older sister imagined. Disgusted with his bumbling father but comes to terms with him after realizing he's a desperately unhappy refrain addict but stayed to watch his son grow up.
tl;dr Kallen is fucking gar.