Marylin is the sister of Vivian and Beldam in Paper Mario: The Thousand-Year Door for the GameCube. She is rather large and is described by Goombella as "a strong and silent type". She always express herself with phrase like: "Guuuh! Guh huh!" The only two words she speaks are "The Thee" when the Shadow Sirens introduce themselves to Mario in Chapter 2. Her lightning attacks can deal heavy damage in the second battle with the Shadow Sirens, where Vivian is replaced by Doopliss. Marilyn never really expresses her personality and just seems to be like Beldam's puppet. Unlike Vivian, Marilyn is not usually yelled at and taunted by Beldam. Beldam seems to rely on Marilyn's strength, which can make her personality towards Marilyn, be that of "false care" to which she only cares about Marilyn because she needs her to beat Mario.