Technology & Combat Characteristics

The Build Burning Gundam is a Gunpla designed for melee combat, its movement and mobility are noted to be similar to that of GAT-X105B/ST Star Build Strike Gundam, and this is not surprising as it is built by Sei Iori who used an earlier version of the Gunpla during the 11th Gunpla Battle World Championship. Due to its melee combat specialization, Sekai Kamiki can use the Gunpla and perform his Jigen Haoh School's style of martial arts without any problem.

Although the unit has no shield, it can use its elbow armor to repel physical projectiles; this is known as 'pinpoint shield defense'. The Build Burning can be equipped with the 'Winning Knuckle' (a large fist formed from parts of the SD-237 Winning Gundam) or the Winning Gundam's Core Fighter to increase the power of its punch. The transparent blue parts on Build Burning's clavicle, forearms and lower legs are capable of storing Plavsky Particles for later emission. These parts are an application of the Star Build Strike's RG System and more of them are hidden below the Gunpla's external surface.

When the fighter unifies his senses with the Gunpla through powerful auto-suggestion, he assimilates with it and increases its performance by more than 3 times. In this state, the Build Burning's performance is comparable or even more than that of Star Build Strike with its RG System activated. While under assimilation, the Build Burning's last known specifications before hitting measurement error was Power Output – 1400, Mobility at 1200, and 0.11 in Plavsky Particle reaction speed. Assimilation can last as long as the fighter's willpower holds out, but its weakness is that damage to the Gunpla is reflected in the fighter's body.

When assimilation occurs with the Build Burning, the emitted Plavsky Particles will turn orange, and the transparent blue parts will also turn orange due to the change in the particles' color. The Build Burning also gains the ability to use fire in its attacks and fire effects can also be emitted from its back. These fire effects can be used to increase the suit's propulsion power. Unlike other Gunpla, the Build Burning's propulsion system does not produce standard particles or flames when activated, instead emitting Plavsky Particles.

History

The Build Burning Gundam was originally built by Sei Iori for the 11th Gunpla Battle World Championship and intended for Reiji's use. The Gunpla was developed from the SB-011 Star Burning Gundam and refined so Reiji could handle it better. After the Championship, Sei further improved the Gunpla into its current form, disguised it as a Dom, and hid it inside the Gunpla Battle World Championship trophy he won with Reiji. Sei did it to leave behind a memory before he graduated from Seiho Academy

The Build Burning Gundam in its Dom disguise was later accidentally discovered by novice fighter Sekai Kamiki, when he was examining the trophy. He then used it to fight in a Gunpla battle against Plastic Model Club president Daiki Miyaga. After defeating Miyaga in battle, Sekai's Dom was sniped by Yuuma Kousaka's Lightning Gundam, who after several shots hits and apparently destroys the Dom. To everyone's surprise, the Build Burning Gundam emerges from the wreckage of the Dom and closes the distance against the Lightning Gundam using its superior mobility and defense. 

The Build Burning Gundam was heavily damaged during it's fight against Shimon, who was almost an equal match for Sekai, despite using a straight-assembled Destiny Gundam. However, as the model damage was set to B, the Gunpla did not sustain much actual damage. After its battle with the GN-9999 Transient Gundam, Yuuma realizes that the Build Burning Gundam cannot handle the power that Sekai was discovering and initiates an upgrade plan, converting it into the Try Burning Gundam. Through China Kousaka, Sei Iori later passed a second Build Burning Gundam (with its inner frame and armor parts separated) to Yuuma Kousaka so that he can use it as spare parts to repair the Try Burning Gundam that was badly damage during the fight with Toritsu Academy.