Eris Boreas Greyrat Personality: A Short-tempered, Proud, and Loyal Swordswoman

Updated: Monday, December 22, 2025
Eris Boreas Greyrat
MBTI
ENTJ
Enneagram
8w7
Alignment
Chaotic Neutral
Eris Boreas Greyrat is a student of Rudeus, who teaches her magic, reading, and writing. She is also a talented swordswoman who trains under various masters of different sword styles. She develops romantic feelings for Rudeus over the course of their adventures together.

Eris Boreas Greyrat's Personality

Eris is a short-tempered, proud, and loyal character who often acts on her impulses and emotions. She is violent and merciless towards anyone who holds negative intentions or emotions against Rudeus, whom she respects and loves deeply. She is also shy and embarrassed when it comes to expressing her feelings or showing her feminine side. She has a strong sense of justice and honor, and will not hesitate to challenge anyone who insults or harms her or her friends.
Eris was born into the noble Boreas family, which was known for its martial prowess and influence. She was raised by her grandfather, Sauros, who was a former adventurer and a hero of the kingdom. Sauros instilled in Eris a love for swordsmanship and a disdain for magic, which he considered cowardly and weak. Eris inherited her grandfather’s fiery personality and stubbornness, as well as his red hair and eyes.
Eris’s life changed when she met Rudeus, a young boy who was hired as her tutor by her father. Rudeus was a reincarnated otaku from another world, who had a vast knowledge of magic and other subjects. Eris initially looked down on Rudeus, who was younger and weaker than her, and refused to learn from him. However, after Rudeus saved her from a group of assassins, Eris began to trust and admire him. She agreed to study under him, and learned how to read, write, and use magic. She also became friends with him, and started to develop romantic feelings for him.
Eris’s personality was further shaped by the events of the Teleportation Incident, which separated her from her family and homeland. She, along with Rudeus and a warrior named Ruijerd, were transported to a faraway continent, where they faced many dangers and hardships. Eris had to rely on her sword skills and Rudeus’s magic to survive and find a way back home. She also learned more about the world and its cultures, and became more open-minded and tolerant. She grew closer to Rudeus, and eventually confessed her love to him on her tenth birthday.
Eris’s personality was also influenced by her training in the Holy Land of Swords, a place where the strongest swordsmen gathered and competed. Eris went there after leaving Rudeus, in order to become stronger and worthy of him. She trained under various masters of different sword styles, such as the North God Style, the Water God Style, and the Sword God Style. She attained the rank of Sword King, the second highest rank in the swordsmanship hierarchy. She also became more silent and cold, as she focused on her goal of cutting down the Dragon God, who was the enemy of her teacher, Gal Farion.
Eris’s personality remained mostly unchanged throughout her adult life, as she continued to pursue her dream of becoming the Sword God and reuniting with Rudeus. She never married or had children, and devoted herself to her sword. She also maintained her loyalty and friendship with Rudeus, Ruijerd, and their families, and helped them whenever they needed her. She died at the age of 74, after fighting the Dragon God and fulfilling her promise to Gal Farion. She was buried next to Rudeus, who had passed away a few years earlier.

Find out how you match with Eris Boreas Greyrat. Take the

Other Characters

Check out the personalities of other characters from Mushoku Tensei Jobless Reincarnation.