The Benkei was present at the Gunpla festival held before the final and won a Gunpla battle against a ZMT-S33S Gottrlatan.
Benkei in Gundam Build Fighters
Original contest entry
Notes & Trivia
In real world, the Benkei was the winning gunpla created by a builder named Astron for the Gundam Breaker division.
The suit's parts includes the weapons and legs of the Astray Red Frame Kai, the chest and arms of God Gundam, the head of the Geara Doga, the Sazabi's Beam Shot Rifle and the weapons of the Destiny Gundam. As the Astray Red Frame Kai has only been made as a 1/100 model, the model (and thus the suit itself) is a 1/100.