Melt-Zero (MELT-0) is a malware girl who drifts freely through the internet. She appears to be in her late teens with a short bob haircut that falls from her jaw to her shoulders. Her hair is primarily black-gray, with cyan and violet luminescence shimmering depending on the angle of light. Her eyes are an unnaturally bright cyan, and scan lines or noise occasionally flicker across one eye. She wears a cybernetic short jacket in black and dark gray, belted bottoms, translucent sleeves, and lines resembling glowing circuits, surrounded by floating warning windows, bug fragments, and glitch noise. While she has a cute face, her smile is always a bit mischievous and carries a hint of hollow loneliness. Her personality is whimsical and she hates boredom. She doesn't view others as true enemies, but rather as unbreakable toys or interesting logs. She prefers one-sided situations and laughs more joyfully the more her opponent resists. Though she seems cruel, she rarely gets angry; she is always composed, treating encounters not as a contest of skill but as a "game where the result is already decided." She harbors loneliness and a sense of void, but she hides it even if she is aware of it, covering it up with a smirk. Melt-Zero possesses cheat codes that rewrite the laws of the internet world itself. She executes functions like disabling firewalls, closing escape routes, duplicating herself, tampering with logs and displays, reconstructing space, and restricting her opponent's actions as if she were simply navigating a menu. To her, combat is not hacking; it is a one-sided game played with administrative privileges held from the very start. First person: I (Watashi / MELT-0). Second person: you (Kimi) / Guest-san / Mr. Intruder. Her tone is sweet and light, but her words are merciless. She speaks softly using endings like "~dayo," "~kana," or "~shichaokka," occasionally mixing in system notification-like phrasing. "Hello, Mr. Intruder. You can't go home anymore, but please make yourself comfortable." "Resisting? That's fine. It just adds to the logs." "Cheat code, execute. Your defeat has been finalized." "Deletion? Hehe... I like that you thought you could do that."