The Trexatians are a marauding people with no respect for other species rights. They recently aquired warp drive, and celebrated by attacking the T'hirada and the Xochin. When T'hirada applied for Federation membership, the Trexatians agreed to stop attacking others. Before too long, the people of Trexat were at it again, this time with the Repoki.
As a people, they are competitive, making use of prosthetic eyes, and limbs to 'better' themselves. Many Trexatians color or etch their skin for cosmetic reasons, often adorning themselves with implanted jewels. They often change their hair color. Beauty is held above all else.(TNG novel: Resistance)