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Malty is the former first princess of Melromarc and also the first to join Iwatani Naofumi's party only to strip him and claim he raped her.
Witch became a genius at lying, spitting insults, and manipulating people. Because, she inherited a few qualities from Trash and the Queen.Perhaps the reason is because Trash spoiled her while she was growing up. According to her mother and sister, Malty hides in the shadow and enjoys bringing misery to others, She will do anything to get what she wants and was never loyal to anything. She is a sore loser of not agreeing her defeat and calls anything against her favor, unfair. She is extravagant and goes as far as to use the countries treasury for her day to day luxurious life spending, calling it "for the sake of the world," and also levying heavy tax on the wave damaged village calling it for reconstruction.
Her Mother mentioned that she already used her own body to gain some benefits. At the very least she gave her body to Motoyasu.Like always, she never remained loyal to anyone and betrayed almost everyone, including the ones she had direct connections, even her own blood relatives.
Witch was first described by Naofumi as a lovely girl with semi-long crimson hair. With as pretty cute face, youthful facial features, yet slightly shorter than Naofumi. Even after her betrayal, Nafoumi admits that she is a waste of beauty and describe her as needlessly attractive.
To fix her bad personality. The Queen let her study abroad in a school in Faubley to learn cultures.
Later, Trash reveals to Nafoumi that Malty firmly backed the church of three heroes idea of hero summoning ceremony. This became his motivation and reason for summoning them without his wife consent.
She choose Motoyasu as the hero under a false alias But for whatever reasons she switched to Nafoumi side.Later she stole is belongings and framed him of attempting to rape her. Though she puts Nafoumi through hell for a while, when the Queen returns from her trip in diplomatic relations she strips Malty of her name as a punishment for the false claims and renames her Bitch thanks to Naofumi's suggestion. Alternative acceptable names by royal decree include Whore and Slut. She did not repent for for her misdeeds and always tries to find ways to hurt or eliminate Naofumi as she believes it is his fault that she has had such misfortune. She has a twisted personality and tries to manipulate everyone.
Malty is ultimately the cause of Naofumi's dark and cynical personality due to the fact that she betrayed him and framed him for raping her for no other visible reason. Naofumi's originally kind personality snapped violently, he became distrustful of anyone who is not a slave, and for a very long time held contempt for women in general. She continued to make him suffer by every means of opportunity, Like trying to take his slave and interfering in the duel for ownership of his slave, calling him a criminal and framing any crime possible. When Naofumi's name was cleared, the queen gave the choice of punishment for Malty to Nafoumi. Malty uses her craftiness and appeal with perfect facial expression to Nafoumi, with the intention of nullify her punishment. But was seen through and he demanded death penalty. This was the first and only time for Malty to call Nafoumi by his name. After been talk down, her punishment was having her name changed to "Bitch".
Motoyasu is the hero that Malty joins for most of the story. After betraying Naofumi, taking his stuff and framing him for raping her, she gives Motoyasu the stolen chain mail and convinces him of her being the victim. Motoyasu completely trust her. Motoyasu, due mostly to his gullibility, ends up being used by her in most cases, such as leading him to nearly take Raphtalia away from Naofumi, levying heavy tax on the village after Motoyasu became it's lord. She seems to have sided with him purely because he has a good looking face. She easily convinced Motoyasu of falsely claiming Nafoumi of having brainwashing shield by which he supposedly brainwashed the people, kidnapping second princess and killing Ren and Itsuku.
Later, when the charges on Naofumi were absolved by the Queen, Motoyasu refused to accept that Malty was the one who framed Naofumi for the longest time; Motoyasu also seemed to pay little attention to Malty's suspicious behavior such as she giving hard time for other female party members and kicking them out(even selling the one named Rino as slave to a noble), her exceptionally wasteful spending which she claims it was for the "for the sake of the world," and also her attempt to kill Melty which Ren and Itsuki notices, but he didn't. Motoyasu even agreed to shoulder her debt to some extent. After the Spirit Tortoise incident, she abandons him completely. After seeing her badmouthing him to Ren of many false charges which causes his mentality to break to the point where he now sees all women(With exception to Filolial Queens and some other women) as pigs, literally, and awoke his Curse Series indirectly.
In "The Reprise of the Spear Hero" Motoyasu still recognizes Malty, to some extent as he can only see and hear her as a pig, thus he was always wary of her and warn others about her.
Ren believes her accusation of Nafoumi's attempt to rape her and berates Nafoumi without hearing his side of story.Later, Ren along with Itsuki points her involvement in the foul play of duel between Nafoumi & Motoyasu and stand for Nafoumi. Ren was the first to notice Malty's attempt to kill Melty and begins to suspect of deeper and starts his investigation with Itsuki. When all of her crimes brought to light by the queen while clearing Nafoumi's charges, Ren along with Itsuki agrees with the punishment to Malty befitting.After the spirit tortoise incident Malty approached Ren and took advantage of his emotional state to manipulate him and used him to escape from Naofumi arresting her.
She later decided he'd be of little use, stole everything of value from him, leaving a note of berating him and joined Mald's revolution, causing his already fragile mental state to fall completely and succumb to the Curse Series of his sword.
He along with other heroes believes her charge on Nafoumi of attempt to rape her and berates him. But still questions her involvement in the duel between Nafoumi and Motoyasu. After Ren's persuasion, agrees to investigate the abduction case on Nafoumi. He along with Ren calls out on her involvement in the duel and stands up for Nafoumi.After her past actions were brought to light by the queen, he along with Ren agrees her punishment to be befitting. During the carl Island, he says that Malty speaks in good term with him before the punishment.
Aultcray, the hero of the cane was her father. He was a doting parent and spoiled her too much. Most of her evil personality stems from this brought up or atleast what it was thought. Even if she causes any trouble she pins it on someone else and he will punish the victim without any thoughts. She gets away from anything with the help of her father. Trash supported Malty in framing Nafoumi of fake rape crime.As a king, He gave too much preferential treatment for the spear Hero with sole reason of Malty being in his party and favoring him.
- Elena Haven/Girl 1:
Though she hates Malty, she pretends to get along with her, so that she doesn't get into any trouble. She also suspects Malty's claims of Nafoumi attempt to rape her, but decided to ignore it. She knows all of Malty's wrong doing in the party and also her involvement in kicking others out, but played along to keep herself in the team. She felt that, in near future Malty will abandon Motayasu and she hopes to claim him for herself. After the Spirit tortoise incident, she abandoned her teammates and left without turning back.She tells Nafoumi that Malty is a person who will out lives at the cost of others and believes that she survived the spirit tortoise.
- Lucy/Girl 2:
She was a school friend of Myne. She teamed up with Spear hero after a couple of days of Malty becoming his party member. She was mentioned to be a noble. She shared the same mindset of Malty in many ways and was almost similar to her, thus got along with her and joined in on all of the evil acts. Notably, despite how she had betrayed Motoyasu, Ren and Malty. She remained royal to Malty, until Malty's failed rebellion. Naofumi not knowing her name called her "Woman 2". It is unknown why she was so loyal to Malty, since she was a noble that was not obligated to serve a former princess, but she was also faced a fate similar to the Witch's.
Understandably, Raptalia hates Malty for what she did to Naofumi, and holds her as a personal enemy. Malty seemed to consider Raphtalia nothing but an annoyance.