Asia Argento

"Lord. Can you please listen to my wish? Please protect Ise-san forever. And also..... Please allow me to continue living with Ise-san....."

- Asia's prayer in Volume 6, Life 4

Asia Argento is one of the many female protagonists of High School DxD. A beautiful nun whom Issei met while in town. She is a girl with a very gentle heart who possesses a rare Sacred Gear, Twilight Healing, in her body that is capable of healing the wounds of Humans, Angels, Fallen Angels, and Devils alike and is Rias Gremory's Bishop.

Appearance
Asia is a girl around 15-16 years of age with long blonde hair and green eyes. Her hair flows all the way down to her back, with split bangs over her forehead and a single strand sticking out from the top, sloping backwards.

Her main attire consists of a dark teal nun outfit with light blue accents, a white veil over her head with light blue accents, a brown satchel slung on her right hip (where she holds her Bible), and brown boots with black straps in an X-shaped pattern. She also wears a silver cross necklace around her neck (she was later forced to remove it after becoming a Devil).

Upon transferring to Kuoh Academy, she wears the Kuoh Academy girls' uniform, albeit with a black sweater vest over her dress shirt in place of the cape and corset.

Personality
Asia is extremely shy, innocent and fairly inexperienced in things like socializing. Despite being reincarnated as a Devil, Asia still believes in God and follows His teachings such as praying to Him and reading the Bible, which would usually result in her getting severe headaches. Even when she was still a human, she harbored no hate towards Devils and treated everyone equally, regardless of what they were. Asia was also in deep shock when she learned from Kokabiel that the God of the Bible was dead.

Asia became more "bold" in her relationship with Issei when the girls start being intimate and dislike the idea of being left out. Asia thinks of Issei very highly, and wants to stay with him forever. However, she will pinch his cheek whenever he lusts over other girls and despite being shy, she will beat or slap someone like Diodora when they insult Issei.

History
Asia was abandoned by her mother when she was a baby and was raised in a church. Some time during her childhood, she gained the ability to use her Twilight Healing and became known as The Holy Priestess. It was during that time that Diodora Astaroth devised a plan to have Asia heal him, a Devil, and caused her banishment from the Church with people labeling her as a "witch". With no place to go, Asia had to rely on the Fallen Angels.

The Red Dragon Emperor's Awakening
Asia first appeared in Volume 1 as an underling of Raynare, which in reality was a plan by the latter to steal Asia's Sacred Gear. After having her Sacred Gear removed from her body which resulted in her death, Rias revives her as a Devil under her as her Bishop. She transfers to Kuoh Academy after Issei rescues her from the Fallen Angels, where she is in the same class as Issei.

In Volume 2, she moves into Issei's house with Rias' help. She later goes to a mountain to train in preparation of the Rating Game between her master and her then fiancé, Riser Phenex. During the Rating Game, she stayed back at the headquarters with Rias due to her lack of combat abilities. She accompanies Rias when she goes to the enemy's headquarters, healing Rias while she is fighting Riser. Her movement was later restricted to prevent her from further healing Rias and Issei's wounds. After Rias resigns from the match following Issei's defeat by Riser's hands, Asia spent 2 days trying to heal Issei but to no avail and was happy when he woke up. When Issei heads to the Underworld to rescue Rias, Asia wanted to follow him but was stopped by Issei. Asia, however made Issei promise her that he will win and bring Rias back with him.

Birth of the Breast Dragon Emperor
In Volume 3, during Xenovia and Irina Shidou's visit to the Occult Research Club to tell the Gremory Team to not interfere in their job, the two eventually met Asia remembering her as a former "Holy Maiden", calling her a "witch" for sinking so low to become a Devil. She was also shocked to learn that the God from the Bible died from the Great War from Kokabiel.

In Volume 4 during the conference between the Three Factions, Issei wanting to know why Asia was exiled from the Church despite her beliefs, asked the Archangel, Michael, to which he responds that after the death of the God of the Bible, the system of the Heavens become inoperable until he and the other Seraphs took over but were unable to operate it like the God from the Bible. Due to this, the belief in the religion weakened and they had no choice but to kick out those that might seem like a threat to the system. When asked by Michael on her current lifestyle, Asia happily responded that she was fond of her current lifestyle and had gained lots of friends and family.

In Volume 5, Asia goes to the Underworld along with the other members of the Occult Research Club for the upcoming Young Devils Gathering that Rias has to attend. During the Rating Game between Rias and Sona Sitri, Asia was eliminated when trying to heal Issei from his blood loss after her healing aura was turned into an offensive aura by Momo Hanakai's Reversal Magic which ended up eliminating both Momo and herself. At the end of Volume 5, she is reunited with the Devil that she saved in the past, Diodora Astaroth, who proposes to her.

In Volume 6, she was kidnapped by Diodora during the Rating Game between Rias and Diodora, who was in cahoots with the Khaos Brigade's Old Satan Faction. It was then revealed that Diodora was the one who set up Asia's excommunication from the Church. After she was saved by Issei, she was sent into the Dimensional Gap by Shalba Beelzebub, which triggered Issei's Juggernaut Drive but was rescued by the Vali Team. Asia then run with Issei on their three-legged race and received cheers from the Occult Research Club members and Azazel. While Asia tends to Issei behind the gym, she kissed him in the lips for the first time and confessed that she loved him and will always be with him.

The Heroic Oppai Dragon
In Volume 9, Asia and the other second-year students of the Occult Research Club took part in the class trip to Kyoto. Prior to the trip, she was given a special card to allow Issei to use Promotion even without the King's presence.

In Volume 10, she, along with Akeno and Koneko cured Issei of Raynare's "curse", telling their feelings to him so he can overcome his fear. She and the rest of the Occult Research Club members were later seen peeping at Issei who confessed his love to Rias, congratulating them while Asia claims that she can follow after Rias.

In Volume 11, Asia accompanies Issei, Yuuto, and Akeno to the Underworld for their middle-class promotion test. While resting, Asia asked Azazel on whether or not she can attain Balance Breaker, which Azazel confirms, saying that she might even obtain a sub-species Balance Breaker but asked her if she knows her weakness, which Asia asks if it is the fact the she is useless in battle aside from healing. Azazel, however, told her that her weakness is her inability to defend herself and advises Asia to make contracts with other creatures that have strong defense after confirming that Asia has a Sprite Dragon under her. When Cao Cao and Georg attacked the Gremory and Vali Team, Cao Cao used one of the abilities of his Balance Breaker to redirect Kuroka and Le Fay's attack towards Asia and an injured Xenovia, forcing Issei to use his Trident Knight to protect them, severely injuring and making him incapable of battle. At the end of Volume 11, Asia, like the rest of the girls of the Gremory Team, was surprise to see only Issei's Evil Pieces return and was confused, asking where he is.

In Volume 12, Asia and the Gremory Team stayed in the Gremory Palace, as the whole team was still in shock at Issei's "death" with Asia proclaiming that she wants to go to Issei's place but knows that Issei will be sad at her for doing so. Later, the Gremory Team went to visit Ajuka Beelzebub in the human world, where they were confronted by Siegfried and the Old Satan Faction. When Yuuto and Siegfried fought one more time, Asia's healing did not show much effect due to her lack of will to move until Issei's Evil Pieces glow and transferred his thoughts to Asia, allowing her to regain her will. After Issei's return and Cao Cao's defeat, she, along with the Occult Research Club members, Azazel, and Ophis, wanted to go on a date with Issei.

The Legend of Oppai Dragon and his Lively Companions
In Volume 14, Asia was able to summon Fafnir to aid them in their fight against Grendel revealing that she was successful in having a pact with the Dragon King with Ophis' assistance.

In Volume 15, Asia is seen in her school swimsuit cheering Xenovia and Irina in their swimming match.

In Volume 16, Asia, along with the Occult Research Club members, Bennia, and Loup Garou, went to Romania to aid Rias and Yuuto that were confined in the Tepes castle. She later participated in the attempt to stop the extraction of the Longinus, Sephiroth Graal, from Valerie Tepes and rescue her; aiding the group that fights with the enhanced Vampires and Grendel. Asia then helped the residents of the Carmilla's castle town that were injured by the mass-produced Evil Dragons. After their return from Romania, she participated in the meeting for the formation of D×D.

In Volume 17, Asia and the Occult Research Club, went to the Underworld and participated in the experience day for the school Sona Sitri built located at Auros in the Agares territory. While doing the respective activities assigned to them, Qlippoth managed to surround both Auros and Agreas inside a barrier and announced their intent to attack after a certain period of time. Before the time was up, they reconfirmed their plan and Asia was tasked to help the wounded using Ryuuteimaru to transport her around the battlefield with Rossweisse guarding her.

Powers & Abilities
Magic Talent: Asia has shown great potential in using magic. As of Volume 14, Asia is studying under Rossweisse in order to learn summoning magic to help defend herself, and increase her combat strength.

Praying: Asia is one of the two Devils, the other being Xenovia, that can pray to God without receiving damage in the form of a headache after Issei made a request to Michael to allow them to pray to God.

Dragon Tamer: She's shown to have some talent of compatibility with Dragons, as she made a pact with a baby Sprite Dragon, Rassei. After receiving Ophis' blessing, her compatibility increased, and made pact with one of the Five Dragon Kings, Fafnir.

Equipment
Twilight Healing (聖母の微笑(トワイライト・ヒーリング), Towairaito Hīringu): Asia's Sacred Gear which allows her to heal humans, Devils, Angels, and Fallen Angels alike. Asia herself shows no actual fighting technique, and mostly relies on her healing abilities. She can send the healing powers of Twilight Healing in a form of a projectile, but it is slightly inferior to her direct touch. In Volume 11, it is stated that Asia can create a bow and arrow of healing power, and if the arrow is about to hit an enemy, it will disperse instead of healing them.

Quotes

 * (Asia's breasts talking in a tsundere fashion) "Stupid Ise, how can you do such a thing while injured! B-But, I’ll definitely cure you!" (Volume 5, Life 5)
 * "I'll sleep with Issei-san too!" (Season 2 New)

Trivia

 * Asia's body measurements are B78-W55-H81 cm. (B31-W22-H32 in.) and her height is 155 cm. (5 feet 1 inch), and her weight is 44 kg. (97 lbs.), as revealed in the visual book with her data.
 * Asia's last name, Argento, suggests that she is of Italian descent. Also, she shares the same name and surname of an Italian actress.
 * Asia's last name is also the Italian word for "Silver", in reference to the silver cross she once wore prior to being revived into a Devil. Silver crosses are common among the Catholic clergy, particularly exorcists.
 * Asia's breasts are revealed to be tsundere when Issei first used his Bilingual ability on Sona Sitri and her peerage during her and Rias' Rating Game.