Description

Ferio is one of the three "seijyuusha" (beast handler) from Cefiro who is sent to Earth to fulfill his trial to defeat Earth's Mashins. His seijyuu looks like a flying bettle and uses the power of sound. After Fuu gets her ovum, Ferio goes after her believing she will lead him to Windam.

Ferio challenges Fuu but she begs him to reason with her instead. Disappointed, Ferio resorts to destroying the city to dig out Windam's hiding place. After Fuu summons Windam, they duel it out on the runway of an airport. Ferio uses the wings of his Mashin to great sonic booms and is nearly able to defeat Windam. Fuu still wants to know why they are here to invade Earth and Ferio says it is to fulfill "somebody's wish" before delivering the final blow. But just in the nickel of time, Umi passes the news Hikaru is still alive and Fuu brings her strength back to defeat Ferio.

After Ferio is defeated, he meets Lantis who explains that the invasion being Emeraude's wish is a lie by Eagle and Alcyone, Ascot and Ferio were just pawns to awaken Earth's Mashin. Ferio then sides with Lantis and helps the three girls fight Eagle.