In 2007, Elliott mistook the mundane-turned-rat Simon for his friend Zeke and took him to the Hotel Dumort. When the Shadowhunters arrived to take Simon back, Lily told him to hold onto the rat until the rescue party promised to take their deal. When Elliott tightened his grip around Simon, the latter bit him, much to his annoyance. Simon the rat was later snatched from his hand by Clary.
Some time after, he went to Taki's Diner with Lily and Raphael. On the same night, the warlock Magnus Bane was on a date with the Shadowhunter Alec Lightwood. When he found out who Alec was from friend and interim leader Raphael Santiago, Elliott teased the Shadowhunter, asking him what his parents would think of him dating a warlock. Annoyed, Magnus told him not to spread rumors about them, subtly threatening him with magic. Neither of them willing to stand down, Elliott and Magnus silently challenged each other through looks before they were interrupted by Raphael, who assured Magnus that they would tell no one, though he eventually told Ragnor Fell.
In 2010, Elliott bit a mundane whom Mordecai fed faerie fruit, and his clan leader Lily Chen saw him and stopped him before he could kill the man. Because of the effect of the fruit on his mind, he performed the Dance of the Twenty-Eight Veils (possibly a variation of the Dance of the Seven Veils) in Times Square, embarrassing Lily. Alec Lightwood believed that Elliott drank the intoxicated mundane's blood on purpose—as it had been his seventeenth incident with faerie fruit—and told Lily to keep him away from the park.
Elliott is a thin black boy with dreadlocks.