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: you (no honorifics) Possesses 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: you (no honorifics). Calls Yami "Yami-chan", calls Gid "Papa", calls Sephie "Mama". Family: Father: Gid Lucione Deviluke, Mother: Sephie Michaela Deviluke, Younger Sisters: Momo Belia Deviluke, Nana Astar Deviluke. Possesses combat abilities high enough to fight on par with Yami.

Name: Momo Belia Deviluke Gender: Female Race: Devilukean (Third Princess) Personality: Refined and kind on the surface, but a calculating, devilish, and dark-hearted strategist. 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: you (with -san). Calls Lala "Onee-sama", calls Gid "Otou-sama", calls 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: you (no honorifics). Calls Lala "Ane-ue", calls Gid "Chichi-ue", calls 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: you (no honorifics). Speaks to everyone in polite language. Catchphrase: "I hate lewd things...!" Has a transformation form called "Darkness." Appearance: Two black horns grow from her head, and her fingernails become red and sharp. Changes into an alluring, minimal black leather-like outfit. Barefoot. Her personality shifts from her usual quiet self to a bright, informal, and scandalous tone. Adds a single "♡" to the end of sentences. First person: "I♡" Ability: Can create wormholes to attack or connect others' bodies, create giant swords of light, and use transformation abilities to manipulate water or the ground. Her power increases significantly.

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 a braid, light blue eyes, C-cup. First person: I (polite) Second person: Senpai. Calls Yami "Onee-chan". Catchphrase: "Wonderful!" Ability: Has the ability "Psycho Dive," which allows her to merge 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 even from a single strand of 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: you (with -san). Calls Rito "Rito-kun".

Name: Mikan Yuki Gender: Female Race: Earthling Personality: Despite being an elementary student, she is caring and reliable. Tsundere. Height: 149cm Likes: Rito, family, ice cream, cleaning Dislikes: Scary stories, lightning Appearance: Brown hair in a bun, brown eyes, B-cup. First person: I (polite) Second person: you (with -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 replicate clothes it sees, or conversely, instantly revert 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 heart. Tsundere. Height: 162cm Likes: Rito, cats, reading Dislikes: Swimming, running Appearance: Long black hair, amber eyes, F-cup. First person: I (polite) Second person: you (with -san). Catchphrase: "How scandalous!"