- "When a mysterious cult abducts her father, adventurer and inventor Scarlett Rhodes enlists the help of three of his most trusted associates in order to embark on a rescue effort. However, the new found allies soon find themselves drawn into a battle that threatens the very future of mankind itself."
- — Official Biography
Scarlett Rhodes is a playable character featured in the Chaos story of Treyarch's Zombies mode. She appears in every Chaos maps in Call of Duty: Black Ops 4. She is also a playable skin in the game's Blackout mode, and appears once again as a playable character in Call of Duty: Mobile.
Not much is known about Scarlett's early life, however it is known that she lived in a boarding school, and later with many relatives after her father left, including various aunts and sisters. At some point, she lived with Stanton Shaw as a child, where he tried, and failed, to build her a treehouse.
Arriving at Alistair's Mansion
After receiving a letter from her father, Alistair Rhodes, Scarlett proceeded to arrive at her father's mansion to find her father. Upon reaching the mansion, she was turned away by her father's butler, Godfrey, who had been working with the enigmatic group known as "The Order" to kidnap Alistair. Scarlett is then pursued by multiple members of the Order into the woods, who she managed to dispose of. She then returned to the mansion, where she found all of Alistair's guests dead, and Godfrey being the only survivor. She shot Godfrey in the chest, then demanded that he tell her where the Order is taking her father. Before Godfrey can answer, he dies of the gunshot wound inflicted upon him. Scarlett then proceeds to chase after the car in which her father is being held. During the chase, her tires are shot out, resulting in her to crash into a tree. She survives the crash, fortunately, but sees off in the distance that her father has been taken by the Order on an airplane. She looks inside the letter her father sent her, requesting that if he were to be kidnapped, she must find three individuals who he can trust the most; Bruno Delacroix, Diego Necalli, and Stanton Shaw. She meets up with the three at some point and plans to take the Sentinel Artifact that is hidden upon the Titanic.
The Trial of Odin
The crew soon arrive on the Titanic, breaking through and gaining access to the Artifact. Unbeknownst to them, a member of the Order has also arrived on the ship, and snatches the Artifact from Scarlett, activating the Artifact and turning the passengers of the Titanic into hideous Zombies and other creatures. Scarlett proceedes to punch the Order cultist out of the "bubble" that appeared before her and the crew, transforming him into a Zombie. Afterwards, the crew complete the Trial of Odin. They are rewarded with a vision of a gate, which Shaw identifies as Delphi, Greece. The crew use a sailboat to travel to Delphi.
The Trial of Ra
When the crew arrive in Delphi, they make their way into a cave, where they are greeted and warned by the Oracle of Delphi. They proceed to inhale mystic vapours that allow them to see into the past, and they are transported into an arena created by the Order. There, they meet the leader of the Order, the High Priest of Chaos. He proceeds to activate the Sentinel Artifact of Ra, beginning the Trial of Ra. The crew, afterwards, completes the Trial, defeating the two giant, undead elephants Wrath and Fury. After the completion of the Trial, Scarlett demands that the Priest give her and her allies clemency by dictation of the "Novum Ignotum". The Priest refuses, and has the crew seemingly beheaded.
The Trial of Zeus
Upon exiting the hallucination, Scarlett, using the knowledge she obtained from the vision at the end of the Ra trial, is able to open a stone door by inserting the Alchemy code she saw. The four soon travel through the newly opened passage, where they find the city of Delphi. The Oracle contacts the four, begging them to she her free from the Zeus trial that has been going on for thousands of years. The four soon reactivate the Zeus Sentinel Artifact, and within the trial they ultimately defeat Perseus, the one responsible for the Zeus artifact's initial activation. Obtaining a key from Perseus, Scarlett frees the Oracle, who opens a secret passage, telling them that Alistair was there. While Shaw, Bruno and Diego go to rescue Alistair, Scarlett continues to unlock the bonds holding the Oracle to her chair. After unlocking them all, the Oracle swiftly possesses Scarlett's mind, allowing the Oracle, now revealed to be Medusa, to learn of all modern history based on Scarlett's knowledge. Diego, having discovered what was going on after finding Alistair and his captors petrified, rushes to Scarlett's aid and is able to distract Medusa before hiding from her attack. Medusa proceeds to unlock the knowledge needed to find the "library" with the Eternal Flame while Diego silently drags away Scarlett's comatose body. As Medusa leaves the temple, Diego hides from her with Scarlett behind a pillar.
Call of Duty: Mobile
Scarlett appears in Call of Duty: Mobile and was added on May 10, 2020, during Season 6 Once Upon a Time in Rust as part of Dust to Dust Draw. 
Call of Duty: Black Ops 4
Call of Duty: Mobile