Nature Spirit: Atom

Nature Spirit: Atom (精羅：原子) is a SIGNI class associated with blue SIGNI. They were introduced in WX-04 Infected Selector. Atoms are titled "Natural Source" (羅原) and are led by their princess Neon, Natural Source Princess. They are named after the atomic symbols for the chemical elements of the periodic table.

Atoms are often designed based on the chemical element of their name. Usually they are depicted and characterized by how, where, or what they are commonly found as, such as causing a voice change or being a common cleaning ingredient.

Gameplay
Atoms are closely linked with Mirurun, but despite being so, many of them have little to do with spells. Atoms are generally based around low-cost banishing effects and generating and protecting other Atom SIGNI.

Level 1

 * Chlorine, Natural Source
 * Chromium, Natural Source
 * Sulfur, Natural Source

Level 2

 * Actinium, Natural Source
 * Fluorine, Natural Source
 * Titanium, Natural Source

Level 3

 * Helium, Natural Source
 * Manganese, Natural Source
 * Thorium, Natural Source

Level 4

 * Neon, Natural Source Princess
 * Radon, Natural Source
 * Uranium, Natural Source