Agent Stone is the secondary antagonist of the 2020 live-action film Sonic the Hedgehog, which is based on the blockbuster videogame series of the same name developed by Sega. He is Dr. Robotnik's assistant and was hired by the government to capture Sonic.
Stone is first seen in the film accompanying Dr. Robotnik to investigate the baseball field of Green Hill. He and Robotnik start to harass and belittle Major Bennington, "translating" Robotnik's words for Bennington as Robotnik sends his army of drones to locate the source energy and begins the investigation. He is later seen with Robotnik who analyzes Sonic's footprint.
After one of the protagonists of the film, Tom Wachowski punches Robotnik in the face escapes with Sonic, Stone quickly enters Tom's house and helps Robotnik, only to be humiliated by him for not chasing after Tom and Sonic instead. Stone then found Sonic's leftover quill.
When Tom and calls the Green Hill Police Station, Robotnik, Stone, and other agents monitor the call. Stone is later seen accompanying Robotnik interrogating a bar patron who was encountered by Tom and Sonic.
After Robotnik fails to capture Sonic and having his drones destroyed, he orders Stone pin himself to the wall and starts to vent his frustrations onto him before noticing Sonic's quill in Stone's jacket and begins to analyze it.
As Robotnik jams to music while analyzing Sonic's quill, Stone accidentally sneaks up and scares him. After analyzes Sonic's quill, Robotnik tells Stone to prepare "The Prototype". He is never seen again later on.
After Robotnik is sent to the Mushroom Planet in the final battle, he begins to lose his sanity. This is shown as he finds a rock that resembles a human face and calls it "Agent Stone" and lugs it around. It is unknown what actually happened to Stone after the events of the film, but it can be assumed that he was arrested by the military or keeps working for the US government and was reassigned due to Robotnik's disappearance.
Since multiple sequels to the film were confirmed, it is a possibility that he will show up again as the main antagonist in one of them
Stone is an average heighted slim man in his late twenties to early 30s with short, slicked black hair and brown eyes and has a neatly trimmed beard. He also wears a black suit with a navy shirt and black tie.
Stone appears to be a normal and level-headed man and very loyal to his boss, as he is used to Robotnik's antics and understands him more than anyone else. He has also shown to be a complete subservient to Robotnik, as he takes the abuse and humiliation from Robotnik without question. He also genuinely cares for or admires Robotnik, to the point of making a latte for him, and considering Robotnik enjoyed the latte, Stone is the only person Robotnik has shown any kindness to.
Dr. Robotnik: Allow me to clarify: in a sequentially-ranked hierarchy based on level of critical importance, the disparity between us is too vast to quantify. Agent Stone. Agent Stone: The doctor thinks you're basic.
~ Robotnik and Stone to Bennington.
Dr. Robotnik: Is he still looking at me funny? Agent Stone: Yes, he is. Dr. Robotnik: Tell him to stop or I'll pull up his search history.
~ Robotnik and Stone about Bennington.
Agent Stone: I just thought you might like a latte with steamed Austrian goat milk. Dr. Robotnik: What do I look like? An imbecile? Of course I want a latte. I LOVE THE WAY YOU MAKE THEM!
~ Agent Stone accidentally interrupting Robotnik's dancing.
Agent Stone and Robotnik in Tom's house.
Stone bringing Robotnik a latte.
Stone watching Robotnik testing out Sonic's quill.
Agent Stone is an original character created for the 2020 film adaptation of Sonic the Hedgehog. He has never appeared in any video games or comics yet. However, Stone is quite similar to the pre-existing character of Snively. Unlike Snively, Agent Stone seems to genuinely admire Robotnik and is not a relative of his.
He can also view as a mix of Orbot and Cubot from the video games, as he understands what Robotnik's words mean but somehow doesn't share the intellect with his boss.
Despite being the secondary antagonist of the film, Agent Stone appeared very little and never interacted with Sonic or Tom.
In the novelization of the film, Agent Stone fills the role of Commander Waters as the one who visits Tom and Maddie at the end, giving them a government radio receiver rather than an Olive Garden card.