Flak Trooper of USRAC Army's Assault Corps

"The Unified Soviet Red Assault Army Assault Corps have made their own flak troopers, and they are doing well in fights against enemy aircraft and flying infantries out there, but they're gonna be also advanced versions of exoskeleton suit-wearing soldiers. If Alfea is under attack, maybe I can stop 'em."

--Su Ji-Hoon, When Alfea Needed Us Most

The Flak Trooper of USRAC Army's Assault Corps is the advanced infantry of USRAC Army's Assault Corps,was the specialist Flak Trooper who very well at against enemy aircraft and enemy flying infantry (like fairies) but they will be advanced exo soldier version of RA3 Flak Trooper.

Only happened in during Invasion of Alfea and USRAC War that USRAC and Beleninsk Pact will train and made them become specialist Flak Troopers serving for USRAC Army's Assault Corps.Also,they will wear RA3 Flak Trooper outfits but even equipped an Soviet exo suits and many anti aircrafts weapons or many heavy weapons.

Hint : Maybe they aren't Gulag prisoners who sentenced to be conscripted troopers,so that they are fully trained by anti-aircraft skills since they used to be conscripts or troopers too.

And they will be used to against Winx Club and fairies of Alfea (even enemy vehicles if they use anti-armored weapons) that they will equip exo suits and many heavy weapons,