Raijin

"Raijin is a four-legged heavy robot. A walking fortress, Raijin is a living mechanical incarnation of positional warfare and heavy armaments. Considerably outperforms any robot at long ranged exchange of fire. Upon activating the Bastion ability, Raijin elevates his tower, gaining strategic advantage as well as protection from his built in shields. While in this mode, Raijin is unable to move but is still able to turn around and fire"

Raijin
The Raijin is a quadrupedal Robot characterized by its heavy armor, limited mobility, and two heavy weapon hardpoints. Its special ability, called Bastion, raises the Raijin's two shields resembling Ecu while elevating its main turret for a better field-of-view to fire its weapons. Although the Raijin is unable to move while in bastion mode, it can still turn and shoot. Just like actual Écus, if enough damage is dealt to the shields, the shields will eventually break, albeit one at a time. The shields also do not protect the Raijin from Splash Damage or sideway impacts of homing missiles from the AT Spiral and SMS Hydra.

The Raijin is well known as the most durable robot in the game. With a maxed out health of 250,000 health, it surpasses the heal of even the Leo. It suffers from an only moderate speed at just 28, the exact same speed of a maxed Rhino when not in Assault Mode. Because of this, it is more common to see Raijins with weapons like the Trebuchet or Zeus. Although slow, the Bastion ability lets it take and return fire, temporarily halt Knife Fighters, and camp on beacons. However, due to its slow speed and large size it is semi vulnerable to artillery when moving and VERY vulnerable when stationary, and the dangerous "Death Button" setup on a Rhino can put a very large dent in your HP pool and may break a weapon or two. As a Sniper or mobile beacon defence weapons tower, the Raijin excels if Death Button setups aren't involved.

Overall, the Raijin's flaws slightly outweigh its strengths. Because of this, some prefer to use a Leo over a Raijin, as the Raijin is essentially a slightly better Natasha with a shield.

Trivia

 * Raijin is Japanese for "thunder god".
 * The Raijin, along with the Fujin, was introduced on April 19th, 2016.
 * The Raijin is one of two robots that has a built-in Écu-like shield, the other being the Rhino.
 * The Raijin is one of two quadrupedal robots, the other being the Fūjin.
 * It is possible for a Raijin to lose half a shield and keep the other half intact after taking damage in Bastion mode. Whether this is due to critical hits or sides of the shield taking damage separately is unconfirmed.
 * In the 1.6.0 update Raijin's base and max speed is increased.