Margiela

Based on Night Chains' records, Margiela's ascension abilities, which are indisputably not to be underestimated, awakened after she joined Night Chains. Anyone who knows about her abilities is always careful not to piss her off for no reason.
As though in response to Margiela, who has always presented herself like a little witch, the act of referring to her as a "witch" somehow began spreading among the people of Night Chains. As you can imagine, this not only doesn't infuriate her, but it will even lift her spirits if you call her that to her face.
Margiela, despite her formidable abilities, isn't passionate about combat or adventures. Instead, she prefers spending her time managing her little store and making costumes. Her dressing style has always been bold, and she's never one to shy away from attempting innovative designs. It makes her day whenever someone discovers the 'ingenuity' in her clothes. Things like whether or not the clothes she designs for herself are over-'revealing' are never in her consideration, nor does she care too much about people's opinions of her tastes. But if anyone tries forcing their conservative views on her, they will undoubtedly get on her bad side.

Margiela was born into a conservative family, with parents who demanded she put her studies first and who forbade her from having any 'unhealthy' hobbies. In such an environment, her only comfort was the one hour she got to spend watching animated shows on the TV every week.
The vivacious, flashily dressed witch in the show looked so free and unrestrained, and Margiela gradually grew a fondness for such a lifestyle, but she was aware that her parents would never approve of such a request. As such, she could only achieve that by herself with discretion.
While no one was home, she would secretly put on witch costumes and stand before the underused mirror to fulfill her tiny wish. At that moment, she'd feel like she had briefly escaped her taxing life and could allow her natural self to be set free. Such a gratifying experience was addictive, and she eventually found it impossible to do without.
Maybe because Margiela got somewhat carried away, she unwittingly loosened up and made a mistake one day. A corner of the eccentric costumes she deeply treasured was inadvertently revealed through the slit of the wardrobe, which led to a discovery by her mother. It went without saying that an intense family fight erupted, but Margiela couldn't understand why her parents had to react so hysterically when she simply wanted a bit of her own joy that didn't affect anyone else. Misery washed over her as she watched them freak out over the witch costumes.
Ultimately, the despondency and loneliness that came from her bottling up her feelings for years and her family's inability to understand her made her decide she was done living in that house, and she stormed out of there, never to return again.
Afterward, Margiela spent a very long time living without a roof over her head until she joined Night Chains. Her ascension abilities then awakened, and she slowly established her specialty costume store, finally attaining stability and the dream life she once longed for, which is perhaps also a happy ending.

The Legendary Tales of Mundus, Volume VI: The Exiled Witch
Long, long ago, a formidable witch once emerged in the Mundus Empire. Nobody knew what her name was; all they knew was that she had overwhelming powers. Predictably, people either envied or feared her.
"She's bound to cause a catastrophe someday!"
Even though this terrible supposition had never been realized, the witch's kinsfolk stubbornly believed that so long as she had such unparalleled powers, a catastrophe would sooner or later befall them all. As a result, they tried suppressing her powers.
Someone begged, "This is all for our family's future. You mustn't be so selfish!"
Someone cried, "Please listen to us. This is also for your own good!"
Someone bellowed, "If you don't agree, don't blame us for what comes next!"
Someone cajoled, "Since you're so powerful, I can stand on your side as long as you do me a favor!"
Unfortunately, all their attempts were futile before the witch's profound powers. That was until one day, multiple strange, unsolved murders occurred within the family. Rather than mourn their deceased compatriots, the people were beyond thrilled, for they could finally eliminate that fearsome existence!
The witch was forcibly taken into the courtroom. In spite of the lack of evidence, her matchless, formidable powers were the best proof of her guilt, and so she was convicted. The years of restraint and betrayal by the relatives she trusted resulted in her being exiled from her homeland for eternity. Before leaving, she took one last glance at her home and people, then left behind a curse: "The family will go to rack and ruin after my departure. Someday, I will eventually return."
Following that, the witch's family indeed withered and crumbled, but the witch never showed up again. At times, people would lament when faced with troubles, wondering where exactly that vile and piteous witch had gone to.