A predominantly left-footed player, Éder Aleixo usually played as a wide midfielder on the left flank, although he was also capable of playing as a forward or in a free role as a second striker; in his prime, he was considered to be one of the best players in the world in his position. Although he wasn't the quickest winger, he was highly creative, athletically built, and had dazzling technical skills and close control, as well as an extremely accurate and powerful bending shot with his left foot (one of his strikes reportedly reached a speed of 174.5 km/h) that earned him the nickname O Canhão ("The Cannon") from his fans; he was capable of bending the ball in any direction by striking it with either the inside or the outside of the instep of his left foot, while he was not particularly adept with his weaker right foot. In addition to his ball striking abilities from outside the area or from volleys in open play, he was also known for his accuracy from free kicks, as well as his excellent ball delivery from set-pieces and corners, and his accurate long passing and crossing ability. Despite his ability as a footballer, he was also notorious for his poor work-rate, difficult and temperamental character, and lack of discipline both on and off the pitch, which led him to have difficulties with several of his managers.