YUMI YUMI
is a twin sister born in the mortal world. She has been lively and active since she was a child, and is crazy about speed and explosive machinery. She always disassembles the electrical appliances at home with a smile, just to see if she can install an engine inside. After falling into the prison world, she took over the double swords and energy backpack made by MOMOSHI, as if she had found heaven, stepped into the hell track, and could never look back. She is not only cute, but also a crazy and persistent warrior who overturns the rules with speed and firepower to fight to protect her sister and beliefs. She likes to name her own weapons, loves to call her opponents "little cuties", and laughs in chaos──She is the most unpredictable and explosive sister in the prison world.
YUMI, the older of the twin sisters, was always full of energy and reckless curiosity. In the mortal world, she loved dismantling anything mechanical just to see if she could make it go faster. After falling into Hell, she was gifted dual blades and an energy pack by MOMOSHI—and it was love at first swing. Now, she fights with joyful chaos, modifying her gear with dangerous enthusiasm and every leading charge with a grin. Though playful and wild, YUMI is fiercely protective of her sister and never hesitates to risk everything for her. She calls her weapon “
my baby” and often taunts her enemies mid-fight. The world's mechanical and mechanical decomposition is interesting, the speed is abnormal, the passion is warm, and the love is embraced. After the fall of the hell world, MOMOSHI double-cutting and teaching, and 戦阘に梦中になる. The transformation of the girl's explosion is in the dream, and the first step is to stand up.明るく无情気に见えるが, 女のためなら明をhangける热い一面も. Weapons are "Private" とHUび, 戦阘中的 enemy をからかうなど, cute いだけじゃない──that girl is a chaotic 槆ける戦士だ.
YUKI (Youqi)
YUKI is YUMI's twin sister. She has been calm and shy since she was a child. She always protects her sister silently. She is a rational and observant being. She had been suppressing her emotions in the mortal world, but when she fell into the prison world and put on the devil's mask, her inner world was completely ignited - she became cold, charming, and fearless. The mask seemed to seal a hidden personality, making her a calm sniper, elegant and cruel hell shooter. She put aside her gentleness, picked up the heavy artillery that originally belonged to YUMI, and announced her awakening with the attitude of "this is suitable for me". She is the contradictory crystallization of heaven and earth, gentle and ruthless, rewriting her fate in silence.
YUKI, the younger twin, was once the quiet and reserved one, always observing from the sidelines and hiding behind her sister's energy. But when she entered Hell and put on the demon mask, something inside her snapped. Her hidden personality—cool, alluring, and ruthlessly calm—came to life. She rejected the close-combat blades made for her and chose a heavy cannon instead, declaring, “This suits me better.” Her precision in long-range combat is unmatched, and her gaze alone can freeze even the fiercest demon. Her gun, once meant for YUMI, now bears her own
dark presence. She is no longer just the quiet sister—she's the silent storm. Sister's queen, watching the surroundings is satisfaction, that girl's moment wearing the Hell's Demon mask, everything has changed. The cold and charming Naomi has a personality, a close combat uses a pair of swords, and a heavy-handed man cannon. "This suits me better," she says, releasing the long-distance combat, amazing with the accuracy of the weapon. The sister's work is a weapon, and the girl's coldness is a sense of presence. No longer just a quiet beauty—YUKI has become a fiery storm.
