Richard John "Dick" Grayson, also known by his superhero alias Nightwing, is a fictional character and a superhero on the DC Universe, and later HBO Max, television series Titans, based on the character of the same name created by Bill Finger, and adapted for television by Akiva Goldsman, Geoff Johns and Greg Berlanti. In this version, he has been acting as a superhero, going by Robin, for about 16 years, operating in Gotham City, under the wing of his adoptive father, Bruce Wayne / Batman, until he decides to leave the city, assuming the name Nightwing in the second season. Dick Grayson was portrayed by Brenton Thwaites from 2018 until 2023.

Trigon is a supervillain appearing in media published by DC Comics. He is one of the most powerful beings in the DC Universe, having enslaved many worlds and dimensions. He is an adversary of the Teen Titans and the Justice League, the father and arch-enemy of the superheroine Raven, and husband of the human Arella.