Cai Yan/Little Lute comes from the mobile games Honor of Kings and Arena of Valor. Though Little Lute lacks in damage output, her Skill 1 and Ultimate is great for Health recovery With magical equipment, she can recover a significant amount of Health.
In team fights, Little Lute should stay close to her team's ranged physical and magical damage dealers, providing them with protection, continuous healing, and crowd control against enemies. When the enemy tanks dive into the backline, activate Little Lute ultimate to remove their resistances after a short duration, making it easier for your team to take them down.