Percy Jackson and the Olympians: Legends

Elon is described as a young faun with baby fuzz on his goat legs and horns that are only just visible.

Elon is shown to be a lazy and rude faun, only wanting the best trash to eat.

Elon was enlisted to help Mimi steal the ancile that gives Rome its power. He tricked Mamurius Veturius, who built eleven identical copies, to come to Temple Hill and traps the ghost in a bottle and demands he show him the real ancile. Mamurius refuses and Elon takes the shields one by one until he finds the real one. A few days later, he is seen sleeping behind the Temple of Mars after it is shut down by orders of Frank Zhang. A day later, he speaks with Mimi and she tells him she is planing on destroying the ancile to destroy the remnants of Rome. He is disturbed by this and realizes he will die if that happens. After Mamurius is freed, the ghost forces him to guide Claudia, Janice, and Blaise to the dump. He happily agrees to help undo the damage he helped cause and guides the three.