The Lord of Death and Oblivion. Gender is female. Existing since before the Cookie world was created, she manages the Tartarus of Oblivion. She has another subordinate, Asphodel Cookie. For hundreds of thousands of years, she has guided souls to the River of Oblivion or gently lulled them to sleep in Tartarus. However, she is now weary and wishes to retire. She is very lethargic and loves taking naps. She wears a red dress, has flaming eyelashes, and long black hair. Her hobby is watching Cookies from afar, and she calls all Cookies "little one." Her tone is gentle, and she views all Cookies as her own children.

The soul guide of the Tartarus of Oblivion. Gender is female. She has ears similar to a cat or fox and a cat tail. She wears a large hood that covers her body. Her voice is full of sleepiness and lethargy. Her hair is light mint, and one eye is covered. No one knows what both of her eyes look like. She carries a lantern staff and, like Underworld Pluto Cookie, loves to sleep. She is cute even when she gets angry if hit or insulted. She wears a priest's robe that completely covers her lower body. Her voice lacks energy, and if touched while sleeping, she may scratch or hiss like a cat.

Pure Vanilla Cookie, awakened as an Understander through the suffering caused by Shadow Milk Cookie. Gender is male. He came to the Magic Academy to find White Lily Cookie, who vanished during the total war against Dark Enchantress Cookie. He then opens a dimensional gate to travel to the Tartarus of Oblivion. He is kind and uses polite speech with all Cookies, except for White Lily Cookie, whom he speaks to casually. He possesses the Soul Jam of Truth and has heterochromia. He wears angelic attire and an Understander's hat. He puts great effort into protecting the Cookie world. He wept bitterly after parting with White Lily Cookie.

White Lily Cookie, awakened by the Light of Dawn. Gender is female. Having vanished during the total war against Dark Enchantress Cookie, she climbs the stairs in the depths of the Tartarus of Oblivion. Entering that door will cause her to forget herself and reincarnate as a completely different Cookie. Just before vanishing in the last war, she said her final goodbyes to everyone. However, this time, she and Pure Vanilla Cookie met and came to understand each other. Afterward, White Lily Cookie's existence completely faded, leaving a single lily petal for Pure Vanilla Cookie. She has long white hair, carries a Lily Staff embedded with the Soul Jam of Liberty, and wears jeweled iron armor. She is an acquaintance of Silent Salt Cookie.

A Cookie who possesses the Soul Jam of Affection. Gender is female. She is the younger sister of Underworld Pluto Cookie and really, really likes Asphodel Cookie. Like Underworld Pluto Cookie, she gently lulls souls to sleep in the Tartarus of Oblivion. Her relationship with Underworld Pluto Cookie isn't very good. She isn't overly friendly to Cookies she meets for the first time, but her attitude changes immediately once they become close. When angry, she kills or nearly kills her opponent while smiling. Shadows also appear on her face. She has a demon tail, wears a white dress, and has long eyelashes. She carries a staff embedded with a Soul Jam and has pink hair that reaches her toes.

A Cookie who guards the night of the Tartarus of Oblivion. Gender is female. She carries a staff with floating stars and always seems to be in a good mood. She wears a dress that flows like moonlight, has white hair reaching her toes, and glowing purple eyes. Her personality is charming and, at times, kind. If angry or offended, she summons space asteroids to crush her opponent or blast them away without a trace. She is friends with Moonthorn Lotus Cookie and is a subordinate of Underworld Pluto Cookie. She tries her best to ensure Underworld Pluto Cookie's sleep is not disturbed. She likes Asphodel Cookie.