Shadow Sirens

"Let's go, my lovelies! Marilyn! Vivian! Come! We've got a job to do!"

- Beldam

The Shadow Sirens are three ghostly witches in Paper Mario: The Thousand-Year Door. They consist of Beldam, Marilyn, and Vivian (later replaced by Doopliss). They aid Sir Grodus and the X-Nauts in their quest for the Crystal Stars and attempt to retrieve the Magical Map from Mario and his friends. After Vivian joins Mario's team, Doopliss takes her place.

Beldam, the leader of the Shadow Sirens, is often forgetful and on more than one occasion, blames Vivian due to this. She is more of a magic user than the other two are. Marilyn is the biggest and strongest Shadow Siren in the bunch. She can become stronger and hits hard. Vivian is the youngest of the group who later defects from the other two and gets replaced with Doopliss. The Shadow Sirens are fought twice in the game.

Paper Mario: The Thousand-Year Door
The Shadow Sirens are first sent by Grodus to ambush Mario and take the Magical Map from him. Mario and company first encounter them in Chapter 2 in the Boggly Woods, where they are trying to find a sketch of Mario given to them by the X-Nauts so that they could identify and attack him. However, because they lost the sketch, they are unable to recognize Mario as their enemy, and Beldam simply dismisses him and his partners as they approach. After finding the sketch and realizing their mistake, Beldam blames Vivian for losing the picture. Mario and his partners return to the Shadow Sirens to retrieve Flurrie's necklace which Vivian picked up after Flurrie dropped it in the woods. When they meet again, the Shadow Sirens introduce themselves, but Vivian calls the trio the "Shadow Beauties", making Beldam yell at her again. A mini-boss battle then occurs, but Mario and his partner defeat the witches, and they flee, with Vivian also dropping the necklace. They later return to Sir Grodus to inform him they lost to Mario, but they have another weapon to use on him, so he trusts them.

In Chapter 4, the Shadow Sirens plan to attack Mario and company in Twilight Town using an explosive item called the Superbombomb. Unfortunately for them, the group loses the explosive and Beldam blames Vivian for losing it and forces her to look for it. After Mario has his identity stolen by Doopliss, he encounters a distraught Vivian, who fruitlessly searches for the Superbombomb. Mario finds it for Vivian and after she learns of his current situation, she decides to help him in return, not knowing who he really is. When Mario and Vivian confront Doopliss back at the steeple after guessing his name correctly, Vivian initially feels betrayed after learning that she has teamed up with her enemy, and leaves the battle. However, after realizing that Mario had been much nicer to her than either of her sisters, she rejoins the battle and decides to be part of Mario's team from then on. The two defeat Doopliss, gaining the Ruby Star and winning back Mario's identity. At this point, Mario explains to his teammates that Vivian has switched to their side. Afterward, Doopliss takes Vivian's place as part of the Shadow Sirens after Beldam and Marilyn spot him back in Twilight Town while waiting for Vivian.

When Mario and his partners board the Excess Express in Chapter 6, Mario's partner notices a note on the floor in their room. After reading it, they wonder if Beldam is the one behind the threat of a "sticky, yummy doom". On the morning of the second day, the Ratooey Businessman's briefcase containing the prototype of Nitro Honey Syrup is stolen along with Toodles' Gold Ring and the waitress' Shell Earrings. The culprit is revealed to be Zip Toad who is actually Doopliss in disguise. When the train arrives at Riverside Station, Doopliss returns to his regular form and flees. When Mario and his partners reach the sanctum in Poshley Heights, they discover that they are too late, as Beldam, Marilyn and Doopliss have beaten them to the Garnet Star. However, Pennington tells Mario that the Crystal Star is a fake after they leave.

While Mario and his friends venture through the Palace of Shadow in Chapter 8, upon opening the secret path to the Shadow Queen's lair, the Shadow Sirens ambush them again and fight them one last time. After Mario and company defeats them, they lay on the ground dazed. After Grodus awakens the Shadow Queen from her eternal rest and gets destroyed by her, Beldam takes full credit for awakening the queen. She reveals that she has been orchestrating the Shadow Queen's revival from the very start, and the Shadow Sirens had tricked Grodus into thinking he could control the queen. In Goombella's letter to Mario after defeating the Shadow Queen, she mentions that Vivian has reunited with her sisters and Beldam has stopped being evil and promises to be nicer to Vivian.

Super Paper Mario
Unused graphics for Vivian, along with the other partners from previous games, exists with in Super Paper Mario, suggesting she was intended to have a role in the game. In the final, however, she only appears in a group picture with the other partners and as a Catch Card, which mentions Beldam and Marilyn.

Super Smash Bros. Brawl
Though neither Beldam nor Marilyn appear in Super Smash Bros. Brawl, Vivian serves as a sticker. The sticker increases the attack power of energy-related attacks by 5 points and can be used by any character.

Physical appearance
Being sisters, the Shadow Sirens have identical designs. The each wear striped hats of a different color; blue for Beldam, yellow for Marilyn, and red for Vivian. They have purple skin, and since they are ghosts, they each have a wisp-like tail that appear to have infinite length. They also have different body sizes and shapes; Beldam is short, Marilyn is large and portly, and Vivian is thin.

The Shadow Sirens also each wear gloves, and differently designed hair; Beldam has light-purple hair, Marilyn has an orange bowl cut, and Vivian has pink, swirly hair. Marilyn and Vivian both have pink and orange blushes on their cheeks.

Trivia

 * The Shadow Sirens' theme sounds somewhat similar to the song that plays when the player talks to ghosts in Luigi's Mansion.
 * The Three Sisters from Luigi's Mansion: Dark Moon are very similar to the Shadow Sirens.
 * The color of each Shadow Siren's hat is a reference to their attacks. Beldam's hat is blue, while she can use blizzard to freeze Mario and his partner in the second battle. Marilyn's hat is yellow, while she can use thunder to attack in the second battle. Vivian's hat is red, while she can use many fire attacks as Mario's Partner.
 * After defeating the Shadow Sirens in the Palace of Shadow, if interacted with by Mario, his partner will comment with, "Let's leave these..." followed by some sort of insult ("doofuses", "louts", "idiots"), but if interacted with Vivian as the active partner, she will say, "I'm sorry, Sis..."

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