"I'm taken aback by how normal he looks. Most of the stylists they interview on television are so dyed, stenciled, and surgically altered that they're grotesque. But Cinna's close-cropped hair appears to be its natural shade of brown. He's in a simple black shirt and pants. The only concession to self-alteration seems to be metallic gold eyeliner that has been applied with a light hand. It brings out the flecks of gold in his green eyes." (page 63)
this quote describes how different Cinna looks from 'normal' Capitol people, with his brown hair, green eyes and plain clothes. His only sense of being like those of the Capitol is his gold eyeliner.
"It's a relief to be alone with Cinna, to feel his protective arm around my shoulder as he guides me away from the cameras, down a few passages and to an elevator that leads to the lobby of the Training Center." (page 352)
This quote describes Cinna's aura of being protective and kind. Katniss clearly values his presence and trusts him a lot.