Senate Guard/Legends

The Senate Guard were a special elite unit during the Old Republic. Many of the Senate guards went on to become Imperial Guards. They were taught one form of martial art known as Hijkata, given extensive blaster training and taught to use a blaster pike, which is basically a purple lightsaber on a staff. Their duty is to guard the senate whilst in session and when none of the Senators' own guards are present.

When Darth Sidious created the alactic Empire, the senate guard's role was steadily marginalized and they were eventually replaced by the Imperial Guards. The plume on the senate guard's helmet was removed, and a dark visor was added.