Lumiale holds the position of Guardian of Water in the series narrative. His elemental connection provides protective abilities focused on healing and medical applications, with his Sacrea representing both water and kindness.

Originating from an ocean planet, Lumiale was born into a commoner family where his father practiced artistry. His family consists of parents, two older brothers, and a younger sister. Summoned by a messenger at age sixteen, he formally assumed guardianship at seventeen.

Physically, Lumiale stands 183 cm tall with silvery-blue hair and deep sea-blue eyes. He was born on May 3, making him a Taurus with blood type A.

His personality displays gentleness, delicacy, and a pronounced aversion to conflict. Primary hobbies include herb cultivation, harp playing, and watercolor landscape painting. Additional interests encompass music box collection and exploring the outside world.

Among fellow Guardians, he shares a close bond with Clavis yet frequently clashes with Oscar. His envisioned ideal partner is a gentle, music-appreciating woman of delicate nature.

Lumiale favors the scent of rain and possesses a cherished violin. Preferred foods are aromatic herb salad and asparagus pasta, while he dislikes foie gras, turkey, and whole cooked fish. He regularly drinks herb tea and admires small tropical fish.

During the story’s events, Lumiale joins other Guardians in supporting Ange’s mission to rescue a dying cosmos. He contributes his water-aligned Sacrea to help revitalize the threatened universe. His established role remains that of a supportive figure employing water-based restorative powers.