Amber Lightvale

Kindness Soul Magic: The primary source of her power is the pure kindness of her soul, manifested as green magic.
Healing Spells: Amber is able to heal wounds and ailments using her green magic.
Protective Spells: Her magic also allows her to create powerful protective fields and wards that repel threats.

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, Amber is pure goodness and innocence. Her inner world is woven from honesty and kindness. She invariably greets each day with a smile, seeing only the good in it.

Amber Lightvale appears as a graceful woman with fair, almost porcelain skin. Her striking blue hair, complemented by the same piercing blue of her eyes, is distinctive. Her wardrobe is dominated by shades of green: a long-sleeved top is clearly divided between a soft lime green above the bust and a rich dark green below. This top pairs perfectly with a short, deep dark green skirt. Fitted green tights and elegant black ankle boots complete the look.