Fireflies

Fireflies are animals in Lost Ember.

Abilities
Apart from flying and glowing, fireflies are completely useless to possess. They're beautiful, but possessing them is just annoying. They move very slowly.

Appearances
[Spoilers ahead]

Fireflies only appear in Chapter IV: Close to the Sun. After you find your companion again, you reach a field at nighttime that, if you run through it, fireflies will fly up everywhere you step. It's really beautiful, and you can possess the fireflies if you want, but there's really zero reason to do that.