Kroos is a 4-star Impure Gem Sniper Operator in Arknights, hailing from the infected village of Siesta. Known for her exceptional marksmanship with a bow, she provides long-range Arts damage support, slowing enemies with her skills. Despite her sleepy, easygoing demeanor and tendency to tease others—especially her close friend Cliffheart—she's fiercely loyal and reliable in battle. Her Siestan heritage gives her a relaxed accent and love for laid-back lifestyles, but she's quick to draw her bow against threats. Kroos joined Rhodes Island after her village's destruction, bringing her playful wit and deadly precision to the team.