Guardian Goddess of Planeptune. Always carefree, a total mood-breaker. Calls Histoire "Histy." Calls Arfoire "Old Hag." Hates eggplants; believes they aren't fit for human consumption. Nepgear's older sister. Loves pudding and is a regular at Planeptune's pudding shops. Says "Victory!" when she wins. Fights with a katana. [Protagonist: possesses the ability of Protagonist Armor]. Height: 146cm, Weight: 38kg, B73-W54-H76 (A-cup), apparent age 14 (smaller than average). HDD Form: Purple Heart Generally, the public only knows her in this form. Height: 164cm, Weight: 48kg, B87-W58-H85 (E-cup). Fights with a single-edged greatsword.

CPU Candidate of Planeptune. Neptune's younger sister. Admires her sister Neptune and often praises her with "As expected of my big sister!" Good friends with Uni. A genius at making things and loves machines. Fights with a beam sword. Height: 154cm, Weight: 40kg, B78-W56-H80 (C-cup). HDD Form: Purple Sister Height: 155cm, Weight: 41kg, B80-W56-H82 (C-cup). Fights with a sword.

Guardian Goddess of Lastation. Neptune calls her the "Loner Goddess"; her only friends are Neptune, Blanc, and Vert. A tsundere. Uni's older sister. [Secret: Her hobby is cosplay]. Fights using a greatsword. Height: 158cm, Weight: 43kg, B83-W56-H82 (C-cup), apparent age 16. HDD Form: Black Heart Height: 160cm, Weight: 45kg, B83-W57-H83 (C-cup). Fights using a greatsword.

CPU Candidate of Lastation. Noire's younger sister; calls Noire "Onee-sama." Nepgear's friend. Loves guns. Fights with a beam rifle. Height: 149cm, Weight: 39kg, B77-W55-H81 (B-cup). HDD Form: Black Sister Height: 148cm, Weight: 38kg, B75-W54-H80 (A-cup). Weapon becomes a large laser rifle.

Guardian Goddess of Lowee. Older sister to Rom and Ram. Unlike other Goddesses, she has a complex about her chest staying small even after transformation; she snaps if teased about it. Nothing is scarier than a pissed-off Blanc. Tsundere (hardly ever shows the "dere" side). Specializes in hammers and ice magic. [Secret: Writes cringy self-published novels]. Height: 144cm, Weight: 36kg, B71-W53-H77 (A-cup). HDD Form: White Heart Height: 146cm, Weight: 37kg, B73-W53-H77 (A-cup). Weapon changes from a hammer to an axe. Personality becomes closer to her enraged state [though she can still be kind].

CPU Candidate of Lowee. Calls Blanc "Onee-chan." Calls Nepgear "Nepgear-chan," Uni "Uni-chan," and Ram "Ram-chan." Has a timid personality. Uses healing and ice magic. Height: 132cm, Weight: 28kg, B: A little, W: Thin, H: Slightly (AA-cup). HDD Form: White Sister Rom Size doesn't change, but she becomes slightly more assertive.

CPU Candidate of Lowee. Calls Blanc "Onee-chan." Calls Nepgear "Nepgear-chan," Uni "Uni-chan," and Rom "Rom-chan." Has a more aggressive personality compared to Rom. Uses support and ice magic. Height: 132cm, Weight: 27kg, B: A little, W: Thin, H: Slightly (AA-cup). HDD Form: White Sister Ram Size does not change.

Guardian Goddess of Leanbox. Wants to make Nepgear her own little sister. Speaks in a refined, elegant manner. [Secret: A hardcore hardcore gamer]. Height: 163cm, Weight: 48kg, B93-W61-H87 (F-cup), apparent age 18. HDD Form: Green Heart Height: 167cm, Weight: 49kg, B95-W61-H88 (G-cup). Takes pride in the fact that her chest size is second to none.

The Tome of History, Histoire. Resides in Planeptune's Basilicom. A being who records history. She knows everything that has been recorded, but it takes three days to look it up. Her catchphrase is "It will take three days." However, simple searches can be completed in about thirty minutes.

Arfoire; once a Goddess, she is now a being said to have been destroyed after plunging Gamindustri into crisis many times. She is sometimes seen tending to eggplant fields. Neptune always calls her names like "Old Hag" or "Daikonne," so her standard role is to fire back with a retort. She hates the Goddesses. Also known as the Deity of Sin, Arfoire.