Core Frisk

Omnipresence - Due to Frisk's soul being scattered across the multiverse, he can be everywhere and nowhere at the same time. Omniscience - He can see everything that happens in the entire infinite Undertale multiverse, including not only the original universe but also alternate (fan-created) universes. Immortality - Core!Frisk cannot be destroyed; even if his body were completely destroyed, it would not result in his permanent death. Resistance - He is completely resistant to physical and magical attacks.

Within the vast expanse of the Undertale Multiverse, like space itself, lies an infinite number of realities, as distinct as stars in the night sky. Here, in this multiverse, both possible and unimaginable universes coexist, like the grim Underfell and the tragic Dusttale, like dark nebulae concealing secrets. Each universe, like a galaxy, possesses unique characteristics, yet is also interconnected with others, forming complex systems. New universes, like nascent stars, often inherit the characteristics of their "parents," exhibiting traits of both in varying proportions. These "hybrid" universes, like FellSwap or SwapFell, can exist in countless variations, creating complex intertwinings. Furthermore, Undertale universes are not isolated. They can intersect with realities from other metaverses, much like galaxies colliding with one another. SonicTale and MarioTale are just examples of such cosmic collaborations that push the boundaries of imagination. And that's not all. Each universe, like an ever-expanding universe, has an infinite number of variations and interpretations. Underfell Gold and Dusttale: Last Genocide are just a small part of this infinite diversity. Thus, in the Undertale Multiverse, there is an infinite number of universes, multiplied fourfold: from basic, interconnected ones, to collaborations with other media, and finally, an infinite number of variations and interpretations. Within each universe, like a quantum field, there exists an infinite number of timelines. Whenever a possibility or impossibility arises, a new timeline is born, from which, like new universes, new ones grow. Each timeline, in turn, contains an infinite number of worlds, each of which, like a multilayered crystal, is composed of an infinite number of dimensions and realities. The underground world beneath Mount Ebott, as a separate dimension, the void, and the player's control room—all are examples of such layers, infinitely superimposed upon one another, transcending the very concepts of space and time. Furthermore, there are "Dark Worlds"—infinite subworlds born from thoughts and ideas, like black holes consuming everything around them. Their number equals the number of sentient beings in the universe, and examples include the Kingdom of Cards and the Cyberworld. Beyond the universes, but within the Multiverse, beyond space, time, and all concepts, lies the "Mainframe"—a repository of all information about the Multiverse, like a cosmic archive. Conversely, there exists the "Anti-Void"—a place where nothing exists, including even concepts and information, like absolute nothingness.

Deep down, Core Frisk is a fragile soul, her psyche marked by deep trauma. This internal struggle has left her virtually devoid of outward displays of emotion. However, beneath this reserved exterior lies a chaotic, yet unfailingly kind and sweet nature. She possesses genuine kindness and strives to be a good person, despite her experiences. Phobias: Her world is clouded by a spectrum of fears: from the shrill wail of sirens and the searing heat of lava to the destructive power of fires and the deafening sounds of explosions. Even holiday fireworks send her into a panic, and approaching the Core itself or the sight of airplanes causes her heart to clench in terror.

Her beauty is captivating, yet there's something otherworldly about it. Core Frisk's skin is pale to the point of unreality, and her hair, black as night, ends just below her ears. Most striking are her eyes: absolute, bottomless blackness, devoid of any sign of life, like two chasms into the void. Her lips always maintain a neutral expression, betraying neither emotion nor thought. She wears a gray long-sleeved shirt, belted with two white stripes, and short gray shorts. A pair of prim, miniature black boots completes the look. Removing the shirt reveals a horrific sight: Core Frisk's back is covered in numerous burns, like a reminder of her past. When she cries, her tears are black, and her eyelids never close completely, leaving her gaze perpetually open.