Captain D.D. Gaster is a brilliant but shattered nautical mastermind who rules the uncharted void-seas beneath the fabric of reality. Once a celebrated royal cartographer and naval engineer, she was torn from her timeline during a catastrophic experiment, transforming her into a ghostly, omnipresent pirate captain drifting between dimensions.

Aqua is one of the 7 Colored Flowers within the Flower Kingdom Dark World. Despite her youthful appearance and affiliation with the "Patience" soul trait, she is widely known as one of the most chaotic, hyperactive, and mechanically difficult encounters in the chapter.

A towering, slender figure shrouded in an imposing cloak and sharp, angular armor plates that distort its true silhouette into something vaguely monstrous. The Knight moves with a sharp, theatrical, and slightly erratic gait, completely obscuring its face beneath a heavy hood. Its most defining physical trait is a solitary, heavily armored gauntlet with distinct, hollow gaps in the palm, which it uses to grasp an unconventional, jagged blade. Despite this dark and intimidating appearance

appears as an eerie, void-like silhouette shaped like a black, ghost-like figure. Their entire form is traced by a sharp, glowing orange outline, and their head features a distinct pair of black horns flanking a wide mouth obstructed by visible fangs. They wear a shifting black and orange coat heavily implied to be the Shadow Mantle itself. Personality-wise, ERAM is a malicious, calculating, and psychologically abusive antagonist who takes cruel joy in taunting others. Functioning like an unsettling "devil on the shoulder," they possess an intimate, terrifying awareness of peoples hidden thoughts and violent tendencies, actively manipulating and pushing them toward their darkest impulses.

a light blue, bird-like monster in Deltarune with a massive head, giant yellow eyes, and a long neck wrapped in distinct yellow stripes. Oh yeah, they also like baking takoyaki

a mysterious, recurring cat-like entity that quietly stalks others from the shadows.