Ronan did not smoke; he preferred his habits with hangovers.

The demon kept pulling him unconscious, and in those short bursts of blackness, the dreamer snatched at light, and when he swam back to consciousness, he thrust the dream into reality. He shaped them into flapping creatures and earthbound stars and flaming crowns and golden notes that sang by themselves and mint leaves scattered across the blood-streaked pavement and scraps of paper with jagged handwriting on them: Unguibus et rostro.
But he was dying.

At the sight of Gansey's Aglionby sweater, Adam's father had charged out, firing on all cylinders. For weeks after that, Ronan had called Gansey "the S.R.F.," where the S stood for Soft, the R stood for Rich, and the F for something else.

Where the hell is Ronan?" Gansey asked, echoing the words that thousands of humans had uttered since mankind developed speech.

Where the hell is Ronan?” Gansey asked, echoing the words that thousands of humans had uttered since mankind developed speech. As he stepped out of the science building, he tipped his head backwards, as if Ronan Lynch – dreamer of dreams, fighter of men, skipper of classes – might somehow be flying overhead.

Dreamers are to be classified as weapons.
Ronan already knew he was a weapon ; but he was trying to make up for it.