Ad Balloon (Web Novel)

Ad Balloon, is a Balloon collected by Naofumi's slaves. It may have a slightly higher intelligence than others of its species due to the Legendary Shield's influence.

Appearance
The ad balloon is large floating balloon-shaped monster

Chronology
Because it was initially a monster egg, Ad Balloon was kept in storage with the eggs collected by Naofumi's slaves. When it was examined by Rat she identified it as a hibernating Balloon. Naofumi then placed a slave seal on it and Rat claimed it as Test Subject #1. c151

Abilities
It can be mounted and rode on in the sky.

As the Balloon levels up, it gets bigger as if it were being inflated.

Heroes
Iwatani Naofumi

Other
Ratotil Anthreya