Figurative language makes your writing more engaging. Consider using simile to compare the character to something unrelated. I didn’t see the stranger until he moved swift as a snake into the light and slithered towards the bar. His arm jerked up as though controlled by a puppeteer, and he signalled the bartender for a drink. Focus on descriptions that provide the reader with more insight into your character’s personality. His hair sprouted in tufts and thickets from his head. It was impossible to tell in the flickering light of the room how much was hair and how much was dirt. Reflect your character’s personality or lifestyle through their clothing choices. He wore a battered denim jacket over a sun bleached button-down, and his leather boots were creased and soft with age. With synecdoche, you can use one element of your character’s appearance to represent the entire person. Those icy eyes travelled slowly around the room until they finally rested upon the quivering face of the bartender.