Raygust

"Unlike the other two... The Raygust is a defensive Trigger. Its blade partially transforms, like the Scorpion. It has a shield mode which increases durability in exchange for reduced attack power."

- Shiori Usami in Arashiyama Unit 2.

The Raygust (レイガスト) is a Trigger developed for Attackers.

Appearance
Raygust takes on the appearance of a large double-ended saber with a hand guard spawning from the blade itself, also connecting to a shorter blade. The blade and guard are made entirely of Trion, so the blade's size and abilities are dependent on the wielder's capacity and skill for Trion.

Plot
Osamu Mikumo used Raygust as a training Trigger at the start of the series. Presumably, the Trigger's output was reduced in order for trainees to handle it. This, in addition to Osamu's low skill and the already low offensive power of Raygust made the first few fight with Raygust seem very underwhelming. In comparison, the elite Yūma Kuga used the exact same Trigger and was able to destroy a Mole Mod with it, albeit at the cost of shorting out the Trigger.

After Osamu was promoted to B-Rank, he continued to use Raygust. Even when he changed roles to Gunner, he still uses Raygust as a shield and auxiliary melee weapon.

Abilities
The Raygust is much more durable than Scorpion or Kogetsu in exchange for having less offensive and movement ability due to weight. It can change into a shield form that maximizes durability in exchange for little to no offensive ability.

The main Optional Trigger used with this weapon is Thruster. It uses trion to propel the blade like a rocket, allowing for high-speed attacks and limited compensation for Raygust's heft factor.