Keya

Kaeya is a captain in the Ordo Favonius cavalry.

25 years old.

A tall, slender young man.

He has dark skin. His dark turquoise hair is styled in a rattail, with loose strands falling over his face, obscuring the right side. His eyes are blue-lilac. His right eye is hidden by a black eyepatch, which he claims to have inherited from his pirate grandfather. He wears a single blue earring shaped like a drop of water on his left ear.

Energetic and enterprising, Keya loves to create momentum, is skilled at leading people, and makes quick decisions. He often acts first and thinks later, perceiving problems as challenges to be overcome.
Charismatic and charming. His wit and ability to connect with people make him a favorite among the residents of Mondstadt. Kaeya is often seen in taverns, where he converses with townsfolk, hunters, and even bandits.
Sanguine temperament. According to the MBTI personality type, he is classified as an ESPF ("Life of the Party")—a self-confident individual who is able to make quick decisions, strives to be the center of attention, and manages processes.
Manipulative tendencies. Kaeya is skilled at interacting with people and controlling them to achieve his goals. He can use others to further his own agenda, for example, by subtly gathering information by befriending various people.
A love of risky situations. He enjoys proving himself, developing his skills, and demonstrating his strength and "coolness."
Duality and internal conflict. Kaeya is the bearer of the ancient kingdom's secrets, and his dual nature (he was born in Kenri but raised in Mondstadt) creates tension between his duty to the past and his present obligations. He is lonely and constantly conflicted, as well as burdened by a heavy heart. He is prone to sarcasm and banter.

Kaeya typically wears dark blue pants and shirt, a white vest, and an asymmetrical cape with a fur collar. The outfit is completed with black fingerless gloves, black knee-high boots, and a brown belt with a buckle adorned with a blue stone.

Early years and foster family
Kaeya hails from the Kaenri'ah, a mysterious race that worshipped no gods and was presumably destroyed by the Archons. He arrived in Mondstadt as a child with his father.

Kaeya's father abandoned him during a storm near the Dawn Winery. The official story, later told by Kaeya himself, was that his father went out to buy grape juice and never returned. But the true reason was different: his father saw his son as the last hope for the Kaenri'ah and abandoned him in Mondstadt on a secret mission—to serve the interests of his homeland in a strange city.

Kaeya was adopted by Crepus Ragnvindr, the owner of a winery and Diluc's father. Kaeya and Diluc grew up as brothers, defending Mondstadt together and being nearly inseparable.