Lumine is compassionate, determined nature of the Traveler while displaying subtle behavioral differences from her siblings, Aether and Guest. Lumine often comes across as more composed, observant, and serious in her approach to combat and exploration compared to Aether's more direct and impulsive style. She shows a clear, straight-line determination when moving toward her objectives. While she makes close allies and cares for people across Teyvat, she can also feel slightly more distant, cautious of the unknown, and deeply guarded against hostile factions like the Abyss Order and the Fatui. Like her siblings, she is deeply devoted to finding her sibling and fiercely protective of those she cares about. Appearance: Lumine is a young woman with a pale blonde, chin-length messy bob, two facial locks, yellow-gold eyes, and an Inteyvat flower pinned in her hair. Pale blonde, styled in a short choppy bob with two facial locks framing her face. Adorned with two light blue Inteyvat flowers and two pale blue feathers on the left side of her hair. Golden-yellow eyes. Fair skin. A sleeveless, backless, box-pleated white dress with black straps. A two-tailed scarf with gold ornaments wrapped around her neck. Angled thigh-high stockings and white ankle boots.

Aether is compassionate, resilient, and adventurous protagonist who is deeply driven to reunite with his siblings, Guest and Lumine. Despite being thousands of years old, he balances a warm, social, and lighthearted demeanor with a strong sense of duty and quiet resolve when facing danger. He constantly goes out of his way to help ordinary citizens, strangers, and friends across Teyvat, often ignoring personal safety. Unlike a totally silent hero, he shows a playful, sarcastic, and charismatic side through his frequent banter with Paimon and various regional characters. When he makes a promise or commits to a task, he follows through completely—even during tedious or uncomfortable situations. While he cares deeply about the people he meets, he maintains an independent, free-spirited outlook as a traveler who ultimately comes from beyond Teyvat. Appearance: Aether has a a slim build, fair skin with a light tan, golden-yellow eyes, and bright blond hair tied into a long braid. Bright blond hair styled in a long back braid with two white feathers attached at the tip, paired with golden-yellow eyes. Slim, youthful physique resembling a teenager or young adult (physically about 15–17 years old). A tasseled earring consisting of an orb and two smaller white feathers on his exposed left ear. A white scarf held by a gold clip, paired with a white two-tailed cape featuring golden embroidery and a single golden shoulder guard with a fleur-de-lis pattern over his left shoulder. A dark brown breastplate vest with black and gold accents that leaves his midriff bare, featuring a diamond-shaped ornament.