Ariadoa

Ariadoa is the Goddess of the Seal (アリアドア、封印の女神；Ariadoa, fuuin no megami) and a supporting character who knows Rista and Seiya from a previous world and life. She often gives advice to Rista and helps Seiya find tutors to train.

Appearance
She has red hair and wears a blue dress that shows much of her ample bosom.

Personality
Ariadora, called Aria by those close to her, is the Goddes of the Seal and acts like a big sister to Rista. She is exceptionally kind and caring. After failing to save Ixphoria, Ariadoa helps revive Rista, making her become a goddess herself.

During tea sessions, Ariadoa often gives helpful advice to Rista on how to train Seiya. Aria is a calm and wise goddess, serving as somewhat a foil to the novice goddess Rista, as well as other goddesses in the realm. She helps calm Valkyrie down, preventing a fight between Valkyrie and Seiya.

History
Ariadoa had a perfect record when it came to saving worlds until she was assigned the B-class world of Ixphoria. For this world she summoned the then reckless hero Seiya, who went on to fight the demon lord of the world along with his other party members Tiana and Colt. Despite Seiya's recklessness, his repeated successes, all being close calls, put her at ease.

However, when it came time to the final battle with that world's demon lord, things started to fall apart. The party barely survived the fight against him, but after what seemed to be a victory, the demon lord revealed he had two lives and ate Ariadoa to regain his strength before killing off the entire party.

This was Ariadoa's first failed world. In an attempt to recompense her guilt from the failure, she had Tiana revived and reborn as the goddess Ristarte. However, she still feels guilty and thus tries to help the reincarnated Ristarte and Seiya save the S-class world Gaeabrande.

Seiya
Ariadoa feels strong guilt for what happened in the past, so she tries to help Seiya whenever he needed training. She introduces Seiya to gods that can help him with his training, such as Cerceus and Adenela.

Ristarte
Ariadoa treats Ristarte like her own younger sister. Ariadoa helps Rista to compensate for her guilt towards her and Seiya.

Powers and Abilities
As a goddess she has natural immortality and cannot be killed by conventional means. As the goddess of seals, her main power comes from her ability to open up someones potential by unlocking a 'seal'. This unlocks one's true abilities and effectively buffs them, as well as giving or upgrading people skills. She is also quite wise, often giving Rista advice on what to do.

Trivia

 * Ariadoa's breast size was stated to be G-cup by Ristarte.