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She is the eldest of the seven. Her desire to win the Alice Game is the strongest of all the dolls, and is primarily driven by her wish to gain the attention of their "Father", the fantastic dollmaker Rozen. Sadistic, spiteful, and arrogant, she has no inhibitions when it comes to the Alice Game. She will use any method available to her, regardless of how brutal it may be, to reach victory.

Initially, it was shown that Rozen abandoned her half-completed form in two parts on his worktable. She was never assembled--although her clothing was completed--and as such, not initially given a Rosa Mystica. It was her love for Rozen that brought her to life, and she crawled off of the table to seek him out. Rozen does later provide her with a Rosa Mystica, only after she is sliced in half by Souseiseki and presumably fated to fade out of existence.

Along with her artificial spirit, Meimei, Suigintou's weapons are her ragged black wings. With their arrow-like feathers, she can conjure up a shield, a large sword, or even twin black dragons. Suigintou can also create destructive blue flames as a last resort in battle. The variety in Suigintou's abilities, particularly when combined with her savagely cunning nature, make her a strong player in the Alice Game.