How does Robert Jordan use imagery in A Crown of Swords?

Imagery:

Lanky Thom with his white hair and mustaches, who had been a Queen’s lover once, and more willingly than himself, not to mention more than a lover, if you believed half he said. Square-jawed Harnan with that tattoo on his cheek and more elsewhere, who had been a soldier all his life. Juilin with his bamboo staff and his sword-breaker on his hip, who thought himself as good as any lord even if the idea of carrying a sword himself still made him uneasy, and fat Vanin, who made Juilin look a bootlicker by comparison. Skinny Fergin, and Gorderan, nearly as wide in the shoulders as Perrin, and Metwyn, whose pale Cairhienin face still looked like a boy’s despite being years older than Mat. Some of them followed Mat Cauthon because they thought he was lucky, because his luck might keep them alive when the swords were out, and some for reasons he was not really sure of, but they followed.

“The trumpets of war shall sound at his footsteps, the ravens feed at his voice, and he shall wear a crown of swords.”