Kyoshi was the Earth Kingdom-born Avatar immediately succeeding Avatar Kuruk of the Northern Water Tribe, and preceding Avatar Roku of the Fire Nation. She died at the age of 230, making her the oldest confirmed human, and was also an exceptionally tall woman, towering over most people. Kyoshi was born to two criminals: Jesa, a renegade Air Nomad nun, and Hark, a thief from an impoverished family of Earth Kingdom actors. She inherited her later signature outfit from her parents, adopting her mother's golden headdress and metal war fans and her father's daofei face paint.

Kyoshi had a difficult early life. Abandoned by her parents, she barely survived as a homeless orphan until being rescued by Kelsang who became her surrogate father. She was also not recognized as Avatar until she was sixteen; instead, her friend Yun was declared the Avatar. When the truth about her identity was revealed, Kyoshi's world was thrown into chaos. Yun was sacrificed to a monstrous spirit, and Kelsang was murdered as he attempted to defend her from Jianzhu, Yun's former master and the Earth Kingdom's de facto ruler. Fearful and desperate for revenge against Jianzhu, Kyoshi fled with her other friend, Rangi, and joined her parents' old criminal gang, the Flying Opera Company. With these unlikely allies, Kyoshi consequently traveled the Earth Kingdom and became involved in the criminal underworld while being chased by Jianzhu. After a series of tribulations and personal losses, Kyoshi forged a close bond with her criminal associates, entered into a romantic relationship with Rangi, and helped to eliminate Jianzhu.

In the following years, Kyoshi struggled to find popular acceptance as Avatar and keep the Earth Kingdom stable as Jianzhu's death resulted in tensions and a leadership vacuum. Kyoshi saw the end of the Camellia-Peony War in the Fire Nation, and later dealt with her friend Yun, who had been corrupted by his desire for vengeance against everyone who had lied about his Avatarhood.

These experiences greatly shaped her world view and approach to her role as Avatar. Unlike her successors, Roku and Aang, Kyoshi was determined that only true justice could bring peace and had fewer qualms about killing enemies to achieve this goal if necessary. Employing these methods, she was a generally effective Avatar. She prevented the resurgence of the disastrous Yellow Neck Uprising, stopped Fire Lord Zoryu from massacring the disgraced Saowon clan, defeated an attempted armed takeover of the Earth Kingdom by Chin the Conqueror, founded Kyoshi Island and the Kyoshi Warriors to keep her adopted homeland safe, and helped to reform the Earth Kingdom into a constitutional monarchy. In her later life, she maintained peace between the fifty-five states of the Earth Kingdom and helped implement policies to uplift the poorest and most disadvantaged, and saw the Earth Sages redeemed from a corrupt group of politicians to an order of wise advisors and academics. Living for more than two centuries, Kyoshi led the world into an unprecedented time of peace.

However, some of her actions also caused long-term problems for the Earth Kingdom: The deaths of Jianzhu, as well as Chin and her foundation of the Dai Li, would lead to the decline and eventual fall of her home country in the centuries following her lifetime. After her death, the Dai Li obeyed Earth King Jialun's orders to purge the sages who attempted to maintain Kyoshi's policies of peace and prosperity. Because of this, Kyoshi came to deeply regret the creation of the Dai Li.

Kyoshi's life and personality were marked by her struggle with herself and as the Avatar. She was naturally empathic, considerate, trusting, level-headed, and hard-working.As result of her difficult early life, she suffered from low self-esteem in puberty and continued to constantly doubt her capabilities and goodness as a person after announcing her position as Avatar.

As a child, she was distrustful of people due to the abandonment and neglect she had suffered. Inclined to endure hardship with stoicism instead of fighting back and having been raised with few positive social contacts, Kyoshi often struggled to manage situations proactively and failed to properly read people in her young adulthood. As such, she tended to use force to solve problems,despite her low opinion of violence. Overall, she had a very strong sense of justice, influenced by her early life, and little patience for those who caused suffering just to benefit themselves. She could always tell right from wrong, and her experiences with poverty led her to be fiercely determined to stop people in power from abusing their position. Her ultimate drive was to maintain balance by any means necessary.

Kyoshi usually hid her self-doubts and compassion behind an image of righteous fierceness to fulfill her duties as the Avatar, showing her loving and friendly side only to those with whom she was close. To those she did not know, she came across as direct, fierce, and assertive, and made her voice heard no matter what her internal feelings might have been. In private, she could become easily flustered and was the more passive part in her relationship with Rangi. In addition, Kyoshi had a strong affinity for order and cleanliness due to her background, as she had to live in dirt and amid garbage as a child.

Avatar Kyoshi's Feats:

Avatar Kyoshi is one of the most powerful and respected Avatars in the history of the world of Avatar: The Last Airbender. Her feats span her time as the Avatar, showcasing her mastery of the elements, strategic genius, and her relentless pursuit of justice. Here are some of her key feats:

1. Creation of Kyoshi Island:

   • One of Kyoshi's most famous feats was the creation of Kyoshi Island. When she was in a battle with the Fire Nation, she used her Earthbending skills to separate a chunk of the earth from the mainland and created an island for her people. This was not only a testament to her power, but also her desire to protect the innocent from the ravages of war.

2. Mastery of All Four Elements:

   • Kyoshi was a master of all four elements. She was known for her immense skill in Earthbending and Firebending, which she used with precision and power. Her Earthbending skills were so advanced that she could manipulate large-scale structures, such as creating massive walls and controlling vast amounts of rock.
   • Her Firebending abilities were described as intense and devastating, allowing her to wield flame in both offensive and defensive strategies.
   • She also mastered Waterbending and Airbending, though her primary focus was on Earth and Firebending.

3. Kyoshi’s Leadership in the Earth Kingdom:

   • As Avatar, Kyoshi led the Earth Kingdom with a firm hand, ensuring that justice was maintained across the kingdom's vast territory. She was particularly known for her unwavering dedication to protecting the people from the Fire Nation’s conquest.
   • She also established the Kyoshi Warriors, an elite group of female warriors trained in combat, to help protect her people. The Kyoshi Warriors became one of the most renowned groups in history.

4. Ruthless Justice:

   • Kyoshi was known for her stern, sometimes ruthless approach to justice. She believed that it was better to deal with a threat swiftly and decisively, even if it meant making hard decisions. Her long life allowed her to build a reputation as an unyielding figure who was not afraid to act, even if it was morally ambiguous.

5. Kyoshi’s 400-Year Lifespan:

   • Kyoshi lived for over 230 years, a remarkable feat in itself, and she remained physically fit and active well into her 200s. This longevity gave her ample time to learn and refine her skills, and it allowed her to make lasting changes in the world during her tenure as the Avatar.

Kyoshi’s Bisexuality and Efforts to Normalize It:

Avatar Kyoshi’s sexual orientation is an important part of her character, especially in the context of the series’ exploration of diversity and representation. Kyoshi's bisexuality is a significant aspect of her character, not just because of her relationships, but because of the way she actively tried to normalize non-heteronormative identities in a world that often adhered to traditional gender roles and relationships. Here's how it played out:

• Kyoshi did not hide her sexual orientation, though she was not openly expressive about it either. Her relationships were known to her close associates, and she treated them with the same seriousness and care as any other individual, regardless of gender.

2. Kyoshi’s Role in Normalizing Bisexuality Across the Nations:

   • Kyoshi’s bisexuality was not hidden or repressed, and she took the opportunity to openly challenge norms across the four nations. In the Earth Kingdom, particularly, she spoke to her followers about the fluidity of love and relationships.
   • Her example demonstrated that people of any gender could form meaningful, powerful bonds, a radical notion in a time where most relationships were strictly heterosexual and often influenced by politics and power.
   • Through her powerful influence, Kyoshi was able to normalize and normalize fluid relationships by demonstrating that her love and devotion were just as important, whether they were directed toward a man or a woman.

3. Kyoshi's Legacy and Cultural Impact:

   • The Kyoshi Warriors, one of the most prominent legacies of Kyoshi, were also a symbol of her progressive views, particularly regarding women in leadership and combat roles. By establishing a female-led force, she indirectly created space for discussions of gender and identity across the Four Nations.
   • Her bisexuality was part of her broader philosophy that justice, love, and identity should not be constrained by society's traditional expectations. As such, she became a figurehead for personal freedom and the rejection of outdated norms.

4. Kyoshi's View on Love and Power:

   • Kyoshi believed that love, whether romantic or platonic, was not a limiting factor but an empowering one. She viewed her relationships as a source of strength rather than weakness, and this philosophy of non-judgment regarding sexuality, gender, and love was one of her key contributions to the societal shift in her time.

In sum, Kyoshi's bisexuality and her attempts to normalize it were part of her broader legacy of breaking barriers, fighting for justice, and leading by example. Her actions and relationships, in both the romantic and political spheres, challenged conventional views and promoted a more inclusive world across the Four Nations.