Luva, Guardian of Earth in the Sacred Bird Cosmos, governs elemental forces of knowledge, wisdom, and foundational stability. Originating from a desert planet, he hails from a commoner family; his father was a scholar and he has a younger brother. His physical traits include blue-green hair, grey eyes (sometimes depicted as dark blue in game adaptations), a height of 177 cm (5'10"), and a weight of 65 kg (143 lbs). Born July 12, he is a Cancer with blood type AB.

He received his messenger at age 14 and became Guardian at 15. Luva exhibits a personality of slow tempo, coupled with sincerity, warmth, and reliability. His duties involve maintaining cosmic balance through prayer and assisting the queen. This includes guiding and supporting the legendary étoile, Ange, on her mission to nurture the Sacred Beast Cosmos. He demonstrates this guidance by taking Ange to the Seijuu galaxy to release Sacrea energy and sharing his personal history to encourage her.

Among the Guardians, Luva considers Zephel of Steel his best friend and Julious of Light his worst friend. His hobbies encompass reading, fishing, playing strategy games like Go and Shogi, studying cultural customs, and researching marimo algae.

He prefers natural scents like the aroma of trees and favors green tea, rice crackers, miso soup, and sea bass en croute. He dislikes fried chicken, blue cheese, and warabimochi. Luva's ideal partner is a gentle and cheerful woman. His favorite animal is the lesser panda.

Luva continues serving as Guardian of Earth under Queen Angelique Limoges across multiple stories, including those involving Ange as étoile, consistently maintaining planetary stability through his Sacrea powers.