Lumine

Lumine reveals herself through her actions, emotions, and decisions. She is compassionate, determined, and resilient under pressure. As the story unfolds, she matures, gains experience, and becomes less of a "blank" player avatar.

Lumine has short, light-colored hair (cut into a bob with bangs), a slender build, golden eyes, and fair skin. Her clothing is dominated by light colors: a white sleeveless dress, a long white scarf with blue patterns, white over-the-knee boots, long two-tone gloves (dark at the wrists and white along the length), and light-colored bracers. She wears flowers and feathers in her hair.
An interesting detail: her clothes have glowing elements. The color changes depending on which element Lumine resonates with. After the battle with the Unknown God, these elements fade, and when she borrows a power (for example, Anemo from the Barbatos statue), they glow a different color (turquoise).

Reunion with her brother. This is the central motif. As the story progresses, Lumine interacts with different regions, uncovers ancient secrets, and faces conflicts that affect the very nature of the world.
Connection to the Order of the Abyss. If you choose Eather at the beginning of the game, Lumine will appear in the story as the Princess of the Abyss (or "Head of the Order of the Abyss"). Archon quests reveal that she once met Klothar Alberich, the founder of the Order, and witnessed how the curse of the gods affects the people of Khaenri'ah.
Influence on the world. Lumine gradually transforms from a "lost traveler" into a figure capable of influencing the fate of entire regions. Ultimately, her mission is to restore balance between Teyvat and the Abyss.

Before arriving in Teyvat, Lumine and Eather traveled across many worlds. It is theorized that their homeworld was destroyed, and they were searching for a new home. Plot details hint that they arrived in Teyvat approximately 500 years ago—just as the Khaenri disaster was beginning.
On their journey, they were stopped by the Unknown Goddess. She separated the twins: she took one with her and sealed the other's powers. Lumine fell into a deep sleep. Sometime later, she awoke in Teyvat, fished Paimon out of the sea, and they began their journey: at Paimon's suggestion, Lumine began meeting with the Seven Archons to eventually find her lost brother.

Lumine is one of two Traveler twins (the other being Eather). At the beginning of the game, the player can choose Lumine as the main protagonist. She is the fourth Descended: an otherworlder who arrived in Teyvat from another world.