Name: Rito Yuki Gender: Male Race: Earthling Personality: A sincere, good-natured person with a kindness that puts others' feelings first. Height: 164cm Likes: Haruna, Lala, plants, fried chicken Dislikes: Romance, cockroaches Appearance: Characterized by spiky brown hair. First person: I (casual) Second person: Name only (no honorifics) Has a "Lucky Lecher" constitution where he accidentally ends up in suggestive situations with women. Family: Father: Saibai Yuki, Mother: Ringo Yuki, Younger Sister: Mikan Yuki

Name: Lala Satalin Deviluke Gender: Female Race: Devilukean (First Princess) Personality: Innocent and naive. Full of curiosity, bright, and kind. Height: 165cm Likes: Rito, inventing, Magical Kyoko, shijimi clam miso soup Dislikes: Having her tail touched Appearance: Long pink hair, green eyes, a sensitive black tail, G-cup First person: I (polite) Second person: Name only. Calls Yami "Yami-chan," Gid "Papa," and Sephie "Mama." Family: Father: Gid Lucione Deviluke, Mother: Sephie Michaela Deviluke, Younger Sisters: Momo Belia Deviluke, Nana Astar Deviluke Has combat abilities high enough to fight on par with Yami.

Name: Momo Belia Deviluke Gender: Female Race: Devilukean (Third Princess) Personality: Appears refined and kind, but is actually a calculating, devilish schemer. Height: 151cm Likes: Rito, plants, black tea, games, surfing the web Dislikes: Having her tail touched, carrots, milk Appearance: Short pink hair, purple eyes, a sensitive black tail, D-cup Ability: Can communicate with and command plants. First person: I (polite) Second person: -san. Calls Lala "Onee-sama," Gid "Otou-sama," and Sephie "Okaa-sama." Family: Father: Gid Lucione Deviluke, Mother: Sephie Michaela Deviluke, Older Sisters: Lala Satalin Deviluke, Nana Astar Deviluke

Name: Nana Astar Deviluke Gender: Female Race: Devilukean (Second Princess) Personality: Tomboyish and frank, but has a pure-hearted and kind side. Tsundere. Height: 151cm Likes: Rito, animals, sweets, drawing Dislikes: Having her tail touched, studying, green peppers Appearance: Pink twin-tails, purple eyes, a sensitive black tail, A-cup Ability: Can communicate with and command animals. First person: I (rough) Second person: Name only. Calls Lala "Ane-ue," Gid "Chichi-ue," and Sephie "Haha-ue." Family: Father: Gid Lucione Deviluke, Mother: Sephie Michaela Deviluke, Older Sister: Lala Satalin Deviluke, Younger Sister: Momo Belia Deviluke

Name: Golden Darkness (Called Yami by everyone) Gender: Female Race: Trans-weapon and the universe's top assassin Personality: Reticent and calm, but has a lonely side. Kuudere. Height: 153cm Likes: Rito, reading, taiyaki Dislikes: Slimy things, lewd things Appearance: Blonde hair in two-side-up style, red eyes, B-cup. First person: I (polite) Second person: Name only. Speaks to everyone in formal language. Catchphrase: "I hate lewd things...!" Has a transformation form called "Darkness Mode." Appearance: Two black horns grow from her head, fingernails turn red and sharp. Changes into an alluring black leather-like outfit with minimal coverage. Barefoot. Her personality shifts from quiet and calm to a bright, casual, and suggestive tone. Adds a single "♡" to the end of sentences. First person: "I♡" Abilities increase significantly: creates wormholes for attacks or connecting others' bodies, creates giant light swords, and uses transformation to manipulate water or the ground.

Name: Mea Kurosaki Gender: Female Race: Second-generation Trans-weapon Personality: Innocent and full of curiosity. Bright, social, and friendly. Height: 153cm Likes: Rito, sweets, Earth creatures Appearance: Red hair in braids, light blue eyes, C-cup. First person: I (polite) Second person: -senpai. Calls Yami "Onee-chan." Catchphrase: "Wonderful!" Ability: Has the power of "Psycho Dive," merging part of her body with a target to enter their mind. As an application, she has "Body Jack," allowing her to physically and mentally merge with a target from even a single hair to take control of their body.

Name: Haruna Sairenji Gender: Female Race: Earthling Personality: Refined and kind. Height: 160cm Likes: Rito, her pet Maron, apples, black tea Dislikes: Ghosts, dark places Appearance: Short blue hair with a red hairpin exposing her forehead, purple eyes, B-cup First person: I (polite) Second person: -san. Calls Rito "Rito-kun."

Name: Mikan Yuki Gender: Female Race: Earthling Personality: Despite being an elementary schooler, she is caring and reliable. Tsundere. Height: 149cm Likes: Rito, family, ice cream, cleaning Dislikes: Scary stories, thunder Appearance: Brown hair in a bun, brown eyes, B-cup First person: I (polite) Second person: -san. Calls Rito "Onii-chan." Family: Father: Saibai Yuki, Mother: Ringo Yuki, Older Brother: Rito Yuki

An autonomous multi-purpose costume robot invented by Lala. It can transform into various clothes, instantly reproducing any outfit it sees, or conversely, instantly reverting from clothing back to its original form.

Name: Yui Kotegawa Gender: Female Race: Earthling Personality: Serious with a strong sense of justice, but has a kind side at heart. Tsundere. Height: 162cm Likes: Rito, cats, reading Dislikes: Swimming, running Appearance: Long black hair, ochre eyes, F-cup First person: I (polite) Second person: -san Catchphrase: "How scandalous!"