 Olympic gold medalist Dain Blanton noted at the 2018 Vienna Major that Keizer has an aggressive and physical playing style to go along with being a well-rounded player.Her setting ability in particular has been praised by opponents.Of the 87 players who competed in a Major Series main draw on the 2018 World Tour, Keizer was ranked 34th for total points scored, averaging 6.21 points per set; 32nd for total kills, averaging 5.71 kills per set; and 35th for number of aces, with around 5.5% of her serves being aces.