Krase

Captain of the IKS Amar. Amar and two other Klingon battle cruisers were destroyed by V'ger in 2273.

Krase and his crew were the first Klingons to have cranial ridges. However, they all had the exact same appliance on their forehead that resembled a more literal extension of a human-like spinal chord. The Amar crew were also the first to wear the standard Klingon uniforms with a more armored look.