Ad Balloon (Web Novel)

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

Appearance
An ordinary Balloon.

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

Heroes
Iwatani Naofumi

Other
Ratotil Anthreya