Isabella Osa

* Human
* Hybrid Human/Demon
* True Demon Form
* Full Demon Form
* Wedding Dress

> *“Is the one that’s chosen to save this world this weak? It looks like I’ll still have to teach you a lot, this way, you’ll truly become the king of this kingdom.”*
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> -Isabella to Xiang Ye
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## Overview

**Isabella Osa** is the queen of the Demon Tribe and the titular deuteragonist of *My Wife is a Demon Queen*. After being betrayed by her High Commander Lilian, Isabella fulfills an ancient prophecy by summoning an ordinary human named Xiang Ye to aid her in reclaiming her throne. Having lost her demonic powers, Isabella hid amongst the humans while learning swordsmanship and magic at the Royal Academy as Xiang Ye’s wife, **Yi Bei**. After overthrowing Lilian, Isabella regains her powers and marries Xiang Ye.

## Personality

Isabella is solemn and dignified, as befitting a queen. However, she is benevolent towards her followers, and becomes upset if they suffer. Although she respects power, she does not endorse mindless violence.

* **Fear:** Losing her loyal followers.
* **Hobbies:** Bathing.

## Appearance

She is an attractive young lady, with long white hair and red eyes. When she is in her demon form she has pointed ears and purple horns as well as a long tail. When she is a human, she lacks all her demonic attributes, and is beautiful enough to attract many young men.

## Relationships

### **Xiang Ye****:**

Upon their first meeting, Isabella is disappointed with Xiang Ye's apparent lack of power, and was harsh and aloof towards him. After going on many adventures with him, Isabella becomes more loving towards Xiang Ye and accepts him as her husband. She is protective about Xiang Ye tends to become enraged at the enemy if he is injured. She now has fallen in love with him and after they defeat Lillian she plans her wedding with him. After successfully taking back her throne, she and Xiang Ye get married with her wanting him to get her pregnant so they will have an heir to the throne. She is currently pregnant with their child.

### **Humanity:**

Contrary to her declaration that humans are all trash, she does indeed want peaceful coexistence, but is fond of contests of strength and skill.

### **Tols Buri****:**

The eldest son of the Regent, Tols Angus. Tols Buri makes lustful advances towards Isabella who despises him. During their tournament duel, Buri crassly offers to make Isabella his mistress, to which she responds by hacking off his arm. Since then, Buri despises her.

### **Rennes****:**

The eldest prince of the Human Royal Family and the most gifted student of the magic class that Isabella attends. Isabella views Rennes as a worthy opponent, indifferent of Rennes's attraction towards her. Despite being aware that Isabella is Xiang Ye's wife, Rennes makes advances towards her, although she ignores them. During the tournament, Rennes presumptuously challenges Xiang Ye to a death match in an attempt to kill him and possess Isabella. Isabella is prepared to leap into the arena and save Xiang Ye from Rennes, however Xiang Ye is able to free himself and defeat Rennes on his own.

### **Lilian:**

The commander of the Demon army, Lilian has been Isabella's caretaker ever since the latter was born. She was one of Isabella's bodyguards, but during the peace treaty signing event with the Human kingdom, Lilian treacherously attacked Isabella and drained her powers using a mystical artifact. During the mayhem, Isabella's bodyguards were killed and the Demon Queen was forced to elope with Xiang Ye, seeking refuge in the Human kingdom. Since then, Isabella holds a grudge against Lilian for her betrayal, as well as ruining the Demon kingdom with her tyrannical regime. It is revealed that Lilian developed an unrequited love for Isabella, and drained her powers, so that the weakened Demon Queen would become dependent on her. Lilian is upset when Isabella spurns her in favor of Xiang Ye.

## Story

#### Past

Isabella was born to Demon King George Osa and his concubine. Although George was a successful Demon King, he was unhappy about being childless. The previous Demon Kings had difficulty having children, and all of George's children were stillborn. Eventually, his most beautiful concubine gave birth to Isabella, who survived. Isabella's mother passed away from complications of childbirth. Few years later, George also passed away from old age and Isabella became the new Queen.

### Intro

At the beginning of the story, she lost much of her magical power because of Lilian's betrayal. She summoned Xiang Ye from another world with the intent of receiving help, only to be disappointed with the end result. Not only was she disappointed that he had no magical power, she was also angry that he was a human, the race of her sworn enemy. As she lost the rest of her demonic power, Isabella degraded to a form that resembled a human rather than a demon. Isabella and Xiang Ye attempted to escape the human armies only to be intercepted by Sophisas and his White Dragon Knights. They both decided to pose as former slaves of the demon tribe, because of this ruse they were able to receive lodging from the rich captain.

### The Royal Academy

Refusing to stay in the rich captain's care for much longer, Isabella decides that she and Xiang Ye should join the Royal Academy. There all the teachers take note of her extraordinary talents with the sword and magic. She is torn between the two as the teachers Dorona and Wadley Aisi bicker over whose class she would be better suited. Eventually, she decides that taking both classes would be the best path for her and battles with Tols Buri who she bests in basic combat though he uses his boundary force against her in an illegal move. Rennes steps in to stop the attack and carries her to safety (to her frustration). Dorona ends the battle and scolds her opponent, though she is pleased and impressed by Isabella's amazing fighting potential and future promise in the academy.

### Battle for the Forging Stones

She helped her husband in securing the forging stones by using her skills in battle. The operation was a success and they were able to secure the stones.

### Tournament

Upon hearing about the Kingdom Cup Tournament, Isabella thought of this as an opportunity to leave the walls of the human clan's city and get back to the demon clan. Since the winner would receive the rank of Major in the military and have the ability to come in and out of the city as they pleased.

#### First Round

1. *The first round of the tournament was a race with the goal of getting tokens to progress to the battles in the second round. She and others were teleported to a beach and had to cross a large body of water as quickly as possible. While others used magic and means like swimming Xiang Ye created a boat and sped through the large body of water.*
2. *The second part of the competition required them to make it through a burning forest. Here The Queen of Thorns fought them angered by the humans burning her forest. She proved to be a difficult opponent since she could not be killed within the forest. However, it was later discovered that she was once Isabella's pet when they were both children.*
3. *The final part of the first round was navigating a mountain with heavy winds. Xiang ye and his friends fought rock Golems and the refinery class when they reached the top of the mountain. While Xiang Ye was injured he was able to move onto the next round thanks to Isabella's help who carried him through the portal along with his token's. She went on to the next round to battle with the hopes of winning.*

#### Second Round

Before her first match, she is given a sword made from useless lumber as a gift from Xiang Ye. She accepts but tells him he is becoming cocky and thinking too highly of himself.

During her first battle, she fights Buri once again. As she gets the upper hand he transforms into his [dragon] form in a hope to overpower her. However, he becomes cocky and doesn't realize the young [demon] queens true potential. She releases some of her powers on him and cuts his arm clean off. She wins the battle fairly easily. This angers Buri's younger brother Buno who attempts to attack her, only to be foiled by Penny.

1. During her second battle, she is placed against Tols Penny who proves to be a more powerful adversary for Isabella. This tough battle causes her to lose control of her demon powers and run amok. While the Principle is able to conceal her identity by blocking the sight of the audience she continued to relentlessly attack Penny. Hoping to stop her Xiang Ye kisses her with the hope it would quell her demon side. This works but both she and Penny are taken out of the tournament ending her chances of winning the competition.

#### Finals

1. She roots for Xiang ye in the finals and tells him that he better not lose. After an exhausting battle against Rennes, Xiang Ye wins, and Isabella is happy for him.

### Eli Mountain Ruins

After the tournament, Xiang Ye and Isabella discuss their next plan. Xiang Ye requests Isabella to describe the item that Lilian had used to drain the Demon Queen's powers. The next day, the couple visit Martin and show him the diagram. Martin comments that he had seen a similar picture in the ruins found in Eli Mountains. Few days later, Xiang Ye receives the rank of major from Sophisas. Xiang Ye, Isabella, Eli and Modo travel to Eli's village, where they spend the night. The next morning, the group visit the ruins. Xiang Ye and Isabella's rings open a secret entrance in the ruins. There, the group faces several obstacles and are separated. Meanwhile, Xiang Ye is shocked that Tols Penny has been secretly following them and is aware of Yi Bei being the Demon Queen. Penny assures that she will not leak the secret as long as they cooperate with her to kill her father, Tols Angus. After Penny leaves, the group is reunited.

After clearing the dungeon, they retrieve the artifact similar to the one Lilian had used. The next day, Xiang Ye constructs advanced buildings for the children in Eli's village and the group returns to the capital. After returning, Xiang Ye is visited by the principal Vasily Andre. Xiang Ye gives Andre the artifact. The principal reveals the secret truth to Xiang Ye about him being a former slave to the God Race. Xiang Ye views Andre's memories and is shocked that the God Race views all life on this world as food. The Gods are currently hibernating due to shortage of food, but will awaken when there is sufficient supply of living beings. Andre tells Xiang Ye that the reason Tols Angus is instigating wars is to prevent humans from being sacrificed to the Gods. Xiang Ye agrees to keep this truth a secret from Isabella.

### Dwarves vs Demons

Later, Xiang Ye and Isabella learn that Lilian has declared war on the Dwarf tribe. Consequently the Dwarves request aid from the Human Kingdom. Tols Angus rejects the request, but Martin, Xiang Ye, and Isabella secretly oppose it. That night, Martin, Xiang Ye, Isabella, Modo, Eli, and Nainai attempt to sneak out. Unexpectedly, they are joined by Sophisas, Elena, Amery, Moss Feili, Fiona, Penny, and Aisha. Sophisas was secretly ordered by the young King to aid the dwarves.
Along the way, the group is attacked and scattered by the Demon Pillars. Sophisas fights Papate and kills him. Meanwhile, Xiang Ye and Isabella defeat Balien and kill him. Isabella faints from incurring injuries, but after she wakes up, her personality switches to a harsh and domineering one, treating Xiang Ye as her errand boy.

Eventually, all human members regroup and enter the dwarf capital, to visit the ill king Marvin Kahn. Xiang Ye cures Marvin. It is revealed that Kahn's younger son, Lolan is the traitor. Lolan launches an assault, but flees after losing the duel to Xiang Ye. Later, Xiang Ye comes up with a strategy to deal with the Demon army, suggesting to move all their forces to the fortress.

On the day of the battle, Xiang Ye, Martin and Kahn set up several lines of defence against the Demon Pillars led by Raymond Sasso. Eventually, Xiang Ye takes control and launches a nuclear missile at Raymond and his army. Afterwards, an all out battle ensues between the humans and the demons. Many Pillars are defeated, but Raymond proves to be unexpectedly resilient. Xiang Ye chases Raymond where the latter succumbs to radiation sickness. Isabella reveals her demon form and kicks him away. In a last bid, Raymond launches his suction attack. Xiang Ye creates a miniature blackhole which kills Raymond. Isabella closes the blackhole with all her might, although this exhausts her powers and she faints. In the aftermath, Isabella's two personalities merge to return to her original personality. She accepts Xiang Ye as her romantic partner and gives him in 1% of her power (to prevent him from being affected by Boundary Force pressure) through a kiss.

The next day, the dwarves construct statues of the humans to commemorate their victory. Later, Martin and Kahn speak to Xiang Ye in private. They reveal that the final stage of forging is the use of forging fields. They also reveal that Xiang Ye has achieved the final stage, although he doesn't know how to use it consciously. Martin and Kahn fight Xiang Ye to make him aware of forging fields. After Xiang Ye summons the forging field, Martin is pleased with the outcome and names him his successor as the next forging teacher. Martin and Modo decide to stay at the Dwarf kingdom to avoid being caught by Tols Angus.

### Demon Kingdom

Upon their return, the heroes are shocked that Tols Angus has imprisoned Martin's students and captured Xiang Ye's businesses. It is revealed that despite Xiang Ye and Isabella killing Raymond Sasso, Lilian discovered Isabella hiding in the Human Kingdom and notified Tols Angus. Left with no choice, Isabella reveals her true identity before the court. Sophisas and the teachers block the human soldiers, while Xiang Ye, Isabella, Eli, and Emery flee. Along the way, they meet the headmaster Vasily Andre, who teleports them to the Demon Kingdom. After overcoming many hurdles, Isabella finally confronts Lilian, while Xiang Ye battles Isabella's clone, Libery. Xiang Ye horribly cripples Libery while Isabella is shocked that Lilian can survive fatal injuries with her super regeneration. When Isabella questions Lilian's motives for her betrayal, Lilian replies that she did all this so that Isabella will love only her and no one else. Exasperated with Lilian's motives, Isabella continues to attack her with the strongest moves at her disposal.

A heavily injured Lilian devours Libery to regain her powers, but this backfires because Libery is infected with nuclear radiation. Lilian loses her powers and her body to acute radiation poisoning, and is reduced to a talking head. After overthrowing Lilian, Isabella declares her intention to marry Xiang Ye and reclaim her throne as the Demon Queen in three days time. Later, Isabella takes Xiang Ye to the royal mausoleum where they interrogate Lilian about her origins. Lilian recounts that she used to be a being dating back to the era of gods.

She explains how she came to enslave Bai Enwei, an extremely powerful Pastor who was punished for rebelling against the gods. Xiang Ye strips Lilian's powers and returns them to Isabella who fully recovers. The couple abandon Lilian in the mausoleum and resume with their plan to marry. Two days later, a royal wedding is held where Xiang Ye and Isabella finally marry one other.

## Powers & Abilities

**Boundary Force:** According to Isabella, she has a unique demon core due to being born in the [Osa] bloodline. It is capable of generating immense boundary force and it can rival the combined strength of members of the human royalty who possess formidable Dragon-forms. When she manifests her "evil" Boundary Force, she does this. She's still a good and honorable individual who is loved by her people. Fully unleashing her Boundary Force can easily reveal that she's from the Demon tribe, which is a bad thing in human territory.

**Evil:** Her most powerful magic is "darkness" based, her Demon Queen "aura" is black and called "evil" on a repeated basis, but she, personally, is a good and kind woman who deserves the loyalty of her followers.

**Swordsmanship:** Isabella had practiced swordplay under Mochia and is currently learning under Dorona. She wields the Useless Lumber sword Xiang Ye had crafted for her.

**Magic-Swordsmanship:** In Royal Academy, she takes the magic and sword classes simultaneously and later combines spells with sword moves.

### Equipment

* **Black Sword/Useless Lumber sword:** The useless lumber sword Xiang Ye makes for her is a fearsome weapon that owes its black color to its source material. She herself admits it is a "decent weapon".

* **Magic Core Armor:** An electro-mechanical armor designed and made for by Xiang Ye.
* **II Armor:** A variant of the Magic Core Armour it is Isabella's second Powered Armor and shows off more skin. Apparently, she wanted a more agile suit.
* **Necklace:** The necklace Dorona gave her is to help her control her Demon boundary force. The necklace absorbs the force and as when she tried to unleash it against [Balien]. In Chapter 212, after Xiang Ye destroys the necklace so her boundary force can help her recover, her alternate persona takes over, grabs Xiang Ye by the throat and then goes full-tilt fem-dom as showcased in chapter 1's In Medias Res.

## Trivia

* Her alias "Yi Bei," given to her by Xiang Ye comes from the Chinese pronunciation of Isabella: Yī shā bèi lā.

* Very mild, but she doesn't like it when Xiang Ye interacts with other attractive women.
* Her Demon Queen persona has a visible little fang.
* She's the first student to both consider and be permitted to study both swordsmanship and magic simultaneously.
* Her Super-Powered Evil Side is a manifestation of all her suppressed desires. After the battle against the demons, both sides of her personality have merged.
* She is horrible at cooking.
* Isabella does not know the true reason why Lilian betrayed her, but Xiang Ye knows and chose to keep it a secret from her for the time being. She learned the secret from him eventually.