Sputter

is the name of the sentient fireball that Maki Oze creates using her abilities as a Second Generation.

Usage
Pusu Pusu takes the form of a small floating fire-blob that generates the sound of crackling fire. When combined with the flames of the Third Generation and Mera Mera, the technique can produce a gigantic, horrendous-looking fireball. Maki likes to create Pusu Pusu for fun, and does so by using a pre-existing source of fire such as a flame on a match.

Trivia

 * The creature's appearance is inspired by Maka Albarn's (who is a main character from Atsushi Ōkubo's previous work) soul.
 * Pusu Pusu ("プスプス") is onomatopoeia of crackling fire.
 * The huge fireball creature, produced using Pusu Pusu and Third Generation flames, can somehow bleed, despite being made out of fire. This is most likely for comedic effect.