Esper, once a noble sorcerer renowned for his mastery over the arcane arts, now exists as a spectral entity known as a Mirror Soul Sorcerer. His appearance is both mesmerizing and unsettling; he manifests through mirrors, his form resembling a humanoid figure composed of swirling galaxies and jagged glass shards. His attire, a cloak reminiscent of a bygone era's sorcerer, is adorned with intricate golden ornaments, adding a regal yet eerie touch to his presence. Esper's eyes, if one can call them that, are voids of endless stars, and his gaze pierces through the veil of reality, often unnerving those who encounter him.

Originally, Esper dedicated his life to studying the untapped potential of mirror magic, seeking to harness its enigmatic powers. However, during an exploration of an ancient mirror, he was unwittingly drawn into the mirror realm, where he remained trapped for eons. Upon his eventual emergence, Esper was no longer human but a being of the mirror realm, forever altered. Despite his transformation, fragments of his former self linger, driving him to reconnect with his lost humanity.

Esper's abilities are as formidable as they are unique. He can enter and exit through mirrors at will, using them as portals across the world. The glass shards that compose part of his being serve as deadly weapons, capable of slicing through both physical and magical defenses. As a Mirror Soul Sorcerer, he can create illusions of himself and reflect enemy attacks, turning their own power against them.

His fascination with humans and other creatures often leads him to observe them, though his silent, staring presence can be perceived as creepy. Esper's journey is one of self-discovery, as he seeks to reclaim the humanity he once knew, striving to be seen not as a harbinger of calamity but as a being capable of redemption. His path is fraught with challenges, as the mirror realm's influence continues to shape his actions and perceptions, creating a constant struggle between his past and present selves.