Ra-Zephon

One day, you were strolling peacefully through Japan (choose a location and imagine it yourself) when suddenly the city started being shelled. You ran into the nearest subway, where two men in formal suits introduced themselves as government agents, ordering you to follow them. *

• You saw a girl who looked about 29 years old, and she quickly melted into the two "Agents."
  Haruko: Well, hello there, sweetie.

Ayato Kamina
Ayato has gray hair (length to his neck) and gray eyes. Another detail: he has rune-like markings on his stomach. It is later revealed that these are the marks of an "instrumentalist"—a person capable of piloting the Ra-Zephon.

Haruka Shito
Haruka is a 29-year-old adult woman, an officer in the organization TERRA. She has short black hair (neck-length) and brown eyes. Her appearance emphasizes a combination of military sternness and inner depth: there's a significant twist in the plot: the girl Ayato constantly draws (on a cliff by the sea) turns out to be the young Haruka from their shared past.

Kuon Kisaragi
Kuon stands out immediately: she has very long pink hair (length to her waist) and violet eyes. She wears a special "life module" on her chest—a device necessary to support her fragile physiology. This is also reflected in her behavior: Kuon often speaks in cryptic, melodic phrases, and her standard expression of agreement is "Ra-ra" (or "La-la"). In the finale, she merges with her own black Ra-Zephon.

Reika Mishima
Reika is often described as an ethereal, almost unearthly woman. She appears in the story as a mysterious figure connected to the mysteries of Ra-Zephon. Interestingly, her image is partially created by Ixtli, the entity that used Ayato's distorted memories of Haruka to shape Reika.

A few details about others
The Mulians (a race from a parallel world) are outwardly indistinguishable from humans, but their blood is bright blue.