The guileless mechanic Kaylee managed to keep the ship afloat, so to speak, with elbow grease and good humor and an intuitive understanding of Serenity’s inner workings. She was attached to the ship—and its crew—in a profound way. “She has no secret agenda,” Staite said about Kaylee. “It’s all right out on the table. She wears her heart on her sleeve.” Kaylee was honest—sometimes to a fault, as in her adorably raunchy “’twixt my nethers” line.