Gabriel

Gabriel is an Angel and one of the Four Great Seraph, a group of Angels that are the guardians of the Throne of Heaven.

Appearance
Gabriel is an extremely beautiful woman with curly blonde hair and a voluptuous figure and is known as the most beautiful woman in Heaven. Signifying her power as a Seraph, she has 12 wings growing from her back.

Personality
Gabriel has a humble, kind, naive and polite personality. She has also been shown to be a clueless person, not even realizing that Issei is a pervert or when he was about to use his Dress Break on her during the Sports Day .Gabriel is also very forgiving and open minded as she does not mind Issei having perverted thoughts towards her as shown in Volume 18. She has displayed a childish side as seen when she told Issei that it's bad to be a pervert in a playful manner.

History
One of the Four Great Seraphim created by the God from the Bible, Gabriel serves as the guardian of the Throne of Heaven along with the other Seraphim. Like the other Angels, Gabriel assisted in the Great War against the Devils and Fallen Angels and was forced to retreat after God died. She and the other Seraphs then tried to activate the Heavens' system and were successful with Michael as its center.

The Heroic Oppai Dragon
She appears in the side story, "Armageddon at Sports Day!", where she is seen reminding Michael of the Sports Day's opening ceremony among the Three Great Powers and introduces herself to the Gremory Team. She later participated in two sports events: the Cavalry Battle (where she nearly became one of the victims of Dress Break, but was saved when Koneko stopped Issei) and the Baton Relay (which she won after Issei and Azazel started a battle with each other, allowing Gabriel to head to the finish line without any trouble and contributing to the Angel's victory ).

Powers & Abilities
Immense Strength: Alongside her older brother Michael, she also wields strength equal to a Satan-Class Devil, strong enough to fight Serafall Leviathan.

Immense Holy Power: As an Angel of the highest order and one of the Four Great Seraphs, Gabriel is one of the most powerful Angels in Heaven, and most likely wields power equivalent to a Satan-Class Devil. The testament of her strength is proven when Irina called Gabriel the strongest woman in Heaven.

Light Weapons: Being an Angel, Gabriel is able to form weapons from light.

Flight: Being an Angel, Gabriel is able to fly using her wings.

Trivia

 * Serafall sees Gabriel as her biggest rival.
 * Issei became the one and only male to see Gabriel's breast when he used Penetrate on his eyes during volume 18. Azazel also said according to female Angels that saw them they described Gabriel’s breast as the finest breast.
 * Gabriel's suit in the Brave Saints system is the Suit of Hearts ♥.