Kasumi Serizawa forms a triad of mahjong prodigies with her sisters Miki and Shouko in the *Super Real Mahjong* franchise. Their escapades extend to the 1990 OVA *Mahjong Battle Scramble*, where a fantastical realm transforms mahjong tiles into currency, thrusting the trio into a high-stakes duel against a rabbit monarch to reclaim their freedom. In the games, Kasumi frequently emerges as a strategic rival, debuting alongside Miki as the opening challenge in *Super Real Mahjong PIII*. Her design adheres to the series’ recurring motif of synchronized hair and eye hues, while her gameplay role centers on tactical mastery. Though the sisters unite in collaborative trials, Kasumi’s individual persona and backstory remain anchored to their collective identity as mahjong-centric siblings within the franchise’s established media.