Beldam is one of the main antagonists of Paper Mario: The Thousand-Year Door and the leader of the three Shadow Sirens, which consists of herself and her sisters, Marilyn and Vivian (who is later replaced with Doopliss). She is more than 1,000 years old and is the oldest of the three sisters. She and the Shadow Sirens work with the X-Nauts to find the Crystal Stars and open The Thousand-Year Door. Beldam and her sisters are reoccurring enemies that appear many times throughout Mario's adventure in Paper Mario: The Thousand-Year Door, making numerous attempts to halt his progress. She and her Sirens always appear during even numbered chapters and are fought a total of two times. In the end, Beldam is revealed to have been the one who arranged for the events of the story, using even the X-Nauts as pawns in her scheme.
Alignment:Lawful Evil to Neutral Good (Beldam was in alliance with the X-Nauts to bring back the Shadow Queen, to which she would ruled over the world serving to her. Prior to this, she was also constantly abusive to Vivian. Though it does appear that they are on good terms now and have given up evil after the events of the game)
Range:Standard Melee to Tens of Meters to Complex Universal
Intelligence:Genius Intelligence (Tricked the X-Nauts into assisting her, along with creating the rumor that the Crystal Stars led to a treasure so that it all came into play for her bringing back the Shadow Queen)
Ice Punch: Beldam will punch their enemy that naturally uses ice with it.
Blizzard: Beldam will create a blizzard that freezes all enemies and causes piercing damage.
Grow: Beldam can increase her size or others, while also getting an increase in power.
Shrink: Beldam can shrink her enemies, reducing their power.
Slow Time: Beldam will slow time on their enemy.
Speedy: Beldam increases her or someone else's speed.
Toxic Magic: Beldam will inflict poison on an enemy.
Other
Standard Tactics: Beldam will use her various magic attacks.
Weaknesses: None.
Battle Records
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↑"If you're familiar with things like Popeye and some of the old comic characters, you would oftentimes see this cast of characters that takes on different roles depending on the comic or cartoon," Miyamoto said. "They might be businessman in one [cartoon] or a pirate in another. Depending on the story that was being told, they would change roles. So, to a certain degree, I look at our characters in a similar way and feel that they can take on different roles in different games."