Suiseiseki is one of the main characters in the anime series Rozen Maiden. She is the third doll of the Rozen Maiden collection, characterized by her heterochromatic eyes—one green and one red—and her vibrant, playful personality. She often speaks in a unique manner, adding 'desu' at the end of her sentences, which has become her trademark. Suiseiseki possesses the ability to manipulate plants and tends to the 'soul trees' of humans. Despite her mischievous demeanor, she is deeply caring and protective, especially towards her twin sister, Souseiseki. Her dynamic presence adds depth and humor to the series.