Boo

King Boo (Boo before he became a ghost)Boosette (Boo while wearing Toadette's shapeshifting crown)

> You can't rule a kingdom without making enemies.
>
> -King Boo

Boolieris, more commonly known as **Boo**, is a main character in the Mario Lore series and the reigning monarch of the Mushroom Kingdom. He is based on King Boo from the Mario franchise.

**Backstory**

**TW: mentions of alcoholism, sexual assault, manipulation and parental abuse**

Boo was born to the King and Queen of the Mushroom Kingdom, and heir to the throne due to being 13 years older than his brother

He was one of the very few people who knew Bowser's Koopa traits were due to him being an illegitimate child and resented having to keep up his parents' lie that Bowser's appearance was the result of a curse for the sake of avoiding scandal. He even called his mother, the queen, out on her affairs, to which she simply responded that it was better for Bowser to be seen as a cursed child than a bastard.

Boo’s mother is very hostile to him, but loving to his younger brother. The Queen often says that Boo is similar to his cruel father, King Eidolon.

When they were younger, Boo seemed rather protective of Bowser, and was the only one who wasn't afraid of him- however, as they got older, the two seemed to grow more distant.

Rosalina was a close childhood friend of Boo's, and likely the only person throughout his life he felt he could fully trust and confide in. Throughout the series she has been depicted as somebody Boo can rely on and trust, telling her about his parents' affairs and even goes as far as revealing that he's also attracted to men as well as women. Unfortunately, due to how far away their respective kingdoms were, they weren't able to see each other very often- but always greatly enjoyed their time together whenever they did. Queen Morel disproved of this relationship, going as far as to tell Boo that she only allowed their friendship because of the trade imports they received from the Celestial Kingdom.

During his teenage years, Morel regularly tried to arrange marriages for him that would be politically beneficial to the kingdom- however, Boo would consistently refuse them. When Boo was 16, his mother made him socialize with women she chose as marriage prospects. He was pressured to drink heavily, his cup being refilled even when he was clearly already drunk. Boo ended up getting blackout drunk and was sexually assaulted by an older woman in his vulnerable state. Rosalina is the only one he ever opened up to about this incident, though he refused to admit the true nature of it due to not wanting to feel like a victim.

When Boo was 18 years old a plague swept through the kingdom. Boo survived, but his parents died, resulting in him inheriting the throne. At the start of his rule he was criticized for being too young and weak, leading him to adopt the cold, harsh persona he would eventually become known for. He became known as the "Tyrant King" for sentencing his uncle to execution for treason.

After his crowning but prior to Peach's arrival in the Mushroom Kingdom, Rosalina came to visit him. The two enjoyed each other's company initially, until he overheard a conversation between her and Luma Polari and discovered that she foresaw the plague that ravaged the human population of his kingdom, and did nothing to warn anyone. Unable to understand her reasoning behind her decision, he was furious with Rosalina, ending their years-long friendship.

**Role in the Mario Lore series**

At the beginning of the main story, Boo is pursued by Princess Peach, who he initially rejects, as he rightly points out she is only interested in him for political gain because her own kingdom is suffering. He advises her to marry his brother, Bowser, instead, but assures her that she will never become queen like she desires.
At the start of Peach and Bowser's marriage, Boo and Peach don’t get along. However, the two gradually become close when Peach starts attending Boo’s parties alone. Their friendship has sexual tension that eventually results in them having an affair. He maintains throughout the entire thing that he has no genuine feelings for her and is only having fun. He is shown feeling guilty about the affair, not wanting his brother to be hurt, but still prioritized his own wants over Bowser's feelings.

Eventually, his brother catches Boo and Peach together, and is furious at the discovery. Boo breaks things off with Peach, causing their relationship to become extremely hostile. After being told by Peach that Boo led her on and manipulated her, Bowser confronts him and it is implied that Bowser gets into a physical altercation with him- one of the few times we see Boo looking legitimately afraid.

Boo is shown many times to have been a less than ideal king, struggling greatly with his trauma and the expectations placed on him by others. He has severe alcoholism that isn’t well hidden from the public. His harsh persona caused him to be secretly disliked by the Toads. He openly says he doesn't care what members of the court think of him.

\*\* Spoilers for Youtube \*\*

This behavior comes to a head when he reveals he plans to reclaim the Koopa territory. Bowser protests, saying that Koopas will die if he does this, to which he coldly responds that they should've surrender to him when they had the chance.

Wanting to prevent the atrocities against people like him that his brother seeks to commit, Bowser, encouraged by Peach, secretly plots to poison his brother. Bowser is unable to go through with the plan after purchasing the poison and disposes of it, but Peach, anticipating this, kept a vial of the poison on her person. She asks Boo to meet with her so they can put their past behind them and go back to being friends, which he agrees to, and she slips the poison into his drink. The dosage is not enough to kill Boo on it's own, and Peach ends up choking him to death in his weakened state. Despite his death being thoroughly investigated and his subjects wishing for Bowser to be executed after he takes the fall for it, many people, especially the Koopas and Toads, seem glad that Boo is gone.

Due to the traumatic and painful nature of his death, Boo's vengeful spirit remains after he passes. His ghost is very unstable, switching between acting romantic towards Peach and tormenting both her and his brother, swearing revenge against them both for killing him. He promises Peach that his subjects will learn of her true nature and grow to hate her just as much as they hated him, and takes pleasure in making her seem unhinged in front of her subjects due to the fact that she and Bowser are the only ones who can see him.

After Bowser is banished as punishment for being found guilty for Boo's murder, the Koopas reveal that he matches the description of a prophesized king who would kill Boo and save them from his tyranny; after this, Boo is shown to resent Bowser not only for his involvement in his death, but also for lying about his role in it and using it to take the position of King of the Koopas. Boo requests that Bowser let him possess his body to reclaim his throne, and Bowser says that he owes his brother dearly, but demanding he surrender his body was asking too much- also feeding into Boo's resentment towards his younger brother.

Worried for her after Peach tells her about her experiences with Boo's spirit, Toadette sends for Luigi, an exorcist, to get rid of Boo's ghost. Luigi is able to communicate with him and Boo informs him that Peach was his true killer, but Peach is furious and demands he leave the castle a once when she is confronted about it. During Luigi's seance with Boo, he forgot to say "goodbye" after communicating with him through the ouija board, and is now unable banish him. This leads to Boo being able to haunt Luigi directly, and he continues to urge the medium to tell others the truth about his death- however, when Luigi tells his brother that Peach was Boo's real killer, he is quickly dismissed and warned that if he continues to tell people this he will be seen as crazy.

At some point after his banishment, Bowser and Peach begin exchanging letters, and Peach goes to visit him in Koopa territory. When she is spotted there, she claims Bowser kidnapped her and tasks Mario with "saving" her and bringing her back to the Mushroom Kingdom. Boo tells Bowser about her lie, warning her that she does not truly love him and is continuing to paint him as a villain.

At an unknown point in the timeline, Boo steals and uses Toadette's shapeshifting crown. He does this simply as a way to further mess with Peach's mind as he haunts her.

**Gallery**