"Welcome, my blood brother. I am the world's salvation, come to save it from all that ails it. Soon, the entire world will embrace... Bloodwork."
—Ramsey Rosso to the infected Barry Allen[src]

Dr. Ramsey Rosso, self-nicknamed Bloodwork,[1] is the son of the late Rachel Rosso and the ex-friend of Caitlin Snow. His plans to create a cure for HLH using dark matter as a binding agent led to him becoming a meta-human. Despite his research and the best efforts of himself and S.T.A.R. Labs, he was unable to find a permanent medical solution to his condition, though he eventually came to the conclusion that he could live forever so long as he strikes fear into others and feeds on their adrenaline-infused blood, leading him to abandon his humanity completely in favor of self-preservation.


Early life

When Ramsey was seven, he hurt his knee in a biking accident. He felt extreme pain and wanted to give up, but his mother encouraged him to never give up despite the pain. Years later, this would become a defining incident with Ramsey and his personality. He eventually followed in his mother's footsteps and became a doctor, working alongside Caitlin Snow until she left to join S.T.A.R. Labs on his mother's recommendation.

Eventually, his mother was diagnosed with HLH cancer forcing Ramsey to watch as his mother's life slowly faded over the course of months. However, instead of fighting the cancer, Rachel Russo instead spent her remaining time doing the things she most wanted to do in life. This particularly angered her son who felt she was being cowardly by not fighting her cancer. Rachel then passed away, leaving her son with lingering feelings regarding death and lab results that showed a 99% chance he would have the same cancer she had.[2]

Fighting death

Ramsey relentlessly researched a cure for himself, running countless simulations that all came back with the same result - that he needed dark matter to complete the cure. Knowing that Caitlin was still employed at S.T.A.R. Labs, a known producer of dark matter, he invited her to his mother's funeral. There, they exchanged pleasantries and Ramsey brought up the idea of meeting again under the guise of friendship.

Caitlin eventually agreed to share coffee with him and they met at CC Jitters. Ramsey quickly moved the conversation about his mother to his research, letting Caitlin know that he needed dark matter to finish it. Caitlin repeatedly objected because it would cause unknown risks, angering Ramsey and causing him to leave the coffee shop. Now being forced to find dark matter elsewhere, Ramsey purchased a dark matter powered weapon off the black market. Taking the dark matter he needed, Ramsey injected himself with the cure. Initially, it seemed to work, but things turned horrifying moments later, mutating Ramsey into something else.[2]

Dealing with Mitch Romero

Despite injecting himself with the cure, Ramsey wasn't completely cured. He sought out another dark matter weapon, only this time his dealer was Mitch Romero. Mitch informed him that the price had jumped from $500 to $5000, when Ramsey informed Mitch that he didn't have the money a fight broke out when Ramsey attempted to take the weapon from Mitch. Mitch knocked him to the ground, leading to Ramsey activating his powers in a moment of distress and exposing Mitch to an unknown substance that ultimately killed him.

Ramsey discreetly took Mitch's body back to his lab, where Mitch resurrected himself and knocked out Ramsey. Ramsey then awoke the next morning to find Barry Allen and Caitlin interrogating him over a dark matter theft that the undead Mitch committed. Ramsey lied, informing them that Ted Kord gave him dark matter and that Mitch broke in and attacked Ramsey. He then manages to convince Barry that he could help their investigation by analyzing a blood sample they found at a crime scene. After some verbal sparring between him and Caitlin, Barry gets a call that Mitch has broken into Mercury Labs.

After Barry brings him a sample of Mitch's blood, he discovers that while the dark matter enhances Mitch it also destroys the healthy cells. Barry informs Ramsey that Mitch has been dead for over 24 hours and starts to leave before Ramsey pleads with Barry to take him with on the investigation. Barry reluctantly does and brings Ramsey to S.T.A.R. Labs to develop a way to beat Mitch.

Ramsey explains to Barry that he could use gene-splicing to weaken Mitch long enough for an arrest, but informs Barry that he'll need more supplies. Barry then leaves the room, allowing Ramsey to steal some dark matter. Barry comes back, revealing that he suspected Ramsey would try something like what he was doing. Ramsey angrily retorts that he's dying and that the dark matter is the only way to cure him, something Barry should understand as he knows the look of a dead man. Barry manages to convince Ramsey to give back the dark matter and help them defeat Mitch.

Later that night, Ramsey continued to study Mitch's blood sample that was mystifying him. Suddenly Ramsey heard a noise and went looking for the source, discovering that Mitch had snuck into S.T.A.R. Labs, who attacked Ramsey shortly after. While being strangled up against a wall Ramsey pleaded with Mitch to stop which, much to Ramsey's shock, worked. After being lowered to the floor Ramsey discovered that Mitch was responding to his voice and visual commands, before Barry rushed Mitch down to the Pipeline and defeat the zombie-like creature.

The ordeal over, Ramsey left S.T.A.R. Labs and took a sample of Mitch's blood with him. He observed immense healing properties and hypothesize that this was the permanent cure he was looking for. He then proceeded to absorb the blood before concluding that he needed more.[3]

Life eternal

Sometime afterward Ramsey broke into a blood bank at a hospital, stealing the blood and taking it to his lab. There, on the verge of collapsing, he injected his mutated blood into the regular blood in the hopes that it would create the same substance from Mitch Romero. Hours later, he injected himself with the new version of the cure but collapsed in pain shortly after injecting it. He discovered that his new cure lacked something that Mitch Romero had before death.

Barry then dropped by with a cure made from Dominator technology leftover from their invasion three years prior. This left Ramsey stumped as he knew Barry himself was dying and that this cure could work for him too. Barry just responded that Ramsey could save lives as well before leaving. Ramsey took a sample of the Dominator cure and injected it into a sample of his cells, dismayed to discover that his body was too far gone for the cure to work. Suddenly he made a realization, Mitch was afraid at the time of his death and thus was releasing adrenaline into his system before death. Ramsey concluded that his victims need to feel fear before he kills them, disregarding the Hippocratic oath that hung above his lab. He arrives at a hospital and starts killing patients and doctors alike.

Long into his killing spree, Flash and Killer Frost arrive to see the damage he's done. While Killer Frost fights his reanimated victims Flash confronts Ramsey, asking him why since he was handed a cure. Ramsey takes a hostage and explains that the cure didn't work, so he decided to use living people as incubators for his cure. He explains that he hasn't just found the cure for HLH but for death itself, making him life eternal. He kills his hostage and escapes through the window, satisfied with his efforts but nowhere near done.[4]


Ramsey mutated.

Some time after strangling Caitlin and leaving his lab, he encountered Ralph Dibny on a rooftop, grabbing him and falling off the building with him. As soon as they fell to the ground, Ramsey continued attacking Ralph, throwing a car at him and firing chunks of black blood at him, most of which the latter was able to dodge, but not for the last few. Ralph managed to gain the upper hand by punching Ramsey and attempted to take him to Iron Heights before Ramsey recovered and absorbed the former's healthy blood cells with his own blood, leaving him on the ground convulsing.

Speed Force tries to save Barry from Ramsey

Ramsey attempts to take control of Barry.

When Barry managed to save Ralph's life by injecting some of his blood into him, a tiny amount of Ramsey's blood had made its way into Barry's body, slowly taking control over him and turning him into a monstrous speedster, who made his way to see Ramsey before bowing to him as his follower, or in Ramsey's words, "Blood Brother".

Defeat and Imprisonment

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"I will never accept death, not like you did."
—Ramsey Rosso to Rachel Rosso[src]

Ramsey can be defined by his obsession and fear of death. Watching his mother die without fighting her cancer caused Ramsey to develop an intense obsession with defeating death. And his mother's acceptance of death caused him to label her a coward, for not taking a chance to fight and survive. Ultimately it was a fear of death that pushed Ramsey to extremes in developing a cure for cancer then testing it on himself, despite advice being given to him about its possible adverse effects. His new obsession strained his friendship with Caitlin Snow.[2]

A short time later, Ramsey began going down a much more sinister path. Having seen a victim of his powers produce a much healthier blood substance (which heals ailments) Ramsey is determined to create more no matter the lives it costs.[3]

Despite Ramsey having a copy of the Hippocratic oath hung up in his lab, he is proven to have no value to the quote "i will do no harm to others" and proceeded to break the oath. He found out that through killing humans with adrenaline infused blood, he can achieve eternal life no matter how many humans it takes for him to kill, which drove him all the more mad.[4]

Ramsey's ultimate goal as of now is to infect every human on the entire planet and get them to pledge their full loyalty to him.

Powers and abilities


  • Meta-human physiology: After injecting himself with the untested HLH cure infused with dark matter, this supercharged Ramsey's blood cells, allowing him to access his new-found powers.[2]
    • Haemokinesis: Ramsey possesses the power to control and manipulate blood. Through this power, Ramsey can also absorb the blood of others to heal or empower himself.
      • Reanimation: Ramsey use his abilities to take blood from others, the trace amount of his own dark matter-infused blood that he leaves in their systems will replicate itself and replace the blood of the victims, reviving them as violent and lumbering zombies that follow Ramsey's desire for dark matter, with him having full control. Shortly after he learned that he can turn people into zombies, he found out that he can also command and control the zombies.[3] Any zombie who goes on without dark matter being injected into them or without Ramsey nearby, they'll melt into a pool of black blood.[4]
      • Blood constructs: Ramsey is able to rearrange his blood cells and transform them into different objects. He has thus far been shown to transform them into elongated tendrils that can penetrate human skin, which he used to take blood from others and as a means of transportation. He can also fire off small pieces as projectiles as well as transform into a blood-mutated behemoth.[3][4]
      • Power augmentation: By absorbing the black blood that he fills his victims/zombies with, he is able to heal himself from his HLH, as well as increase his own power and his blood mass. Allowing him to make larger blood constructs in his blood form. It also shows in his physical appearance, as his veins have become noticeably and increasing black as a result of the dark matter blood.
    • Superhuman strength: Ramsey has shown to have a remarkable amount of strength, as he demonstrated the ability to break open a lock with his bare hand when stealing blood from a hospital.[4] He also single-handedly lifted Caitlin Snow off her feet while strangling her. When he attacked Elongated Man, he threw a car at him.
    • Essence duplicity: Ramsey is able to create another mind of himself through infecting others with his own blood without having to absorb their healthy cells, changing their personalities and turning them into monsters that pledge their full loyalty to Ramsey himself as shown when Barry became fully infected, which filled his eyes and teeth with black blood, including changing the color of his lightning when he runs, and ran to Ramsey, looking up and bowing to him.
    • Mind manipulation: Ramsey's blood has the ability to infect human brains and project hallucinations to its victims as shown when Barry was hallucinating. This ability also causes for Ramsey to be able to perceive his victims thoughts.[1]


"He's one of the most brilliant doctors on the planet."
Barry Allen[src]
  • Genius-level intellect: Ramsey is exceptionally intelligent individual; possessing a doctorate.[2]
  • Medical knowledge: Ramsey is a skilled biologist possessing intricate knowledge of the human anatomy and physiology; allowing him to experiment on himself.
  • Expert of deception/Manipulator: Ramsey is a very good actor; he can act like a civilized doctor when around others without them suspecting anything.


  • Insatiable hunger: Despite Ramsey's cure managing to cure his HLH, the cure's effects are only temporary. There is a steep price in order to maintain his cured state: Ramsey needs to feed on dark matter infused blood. Specifically, he finds out that in order to maintain his health, to keep himself alive, he needs to feed off of human beings with adrenaline-infused blood; not normal blood. This means he must make certain that his victims are in a state of great fear before he absorbs their blood, thereby killing them.[4]
  • Mental instability: Ramsey's obsession with defeating death has defiled his humanity. He only cares about surviving and nothing else; the more individuals he kills, the more unstable he becomes.
  • Constant movement: In order for Ramsey to keep as much blood pumping around his body as possible, he needs to be constantly moving. The less he moves and the calmer he is, the weaker he will be.


The Flash

Season 6


  • Ramsey is the second main antagonist to not been killed during his defeat. The first being Hunter Zolomon. However, Ramsey has not been cured of his sickness so his death can happen in the near future.
  • His mutated form is similar to the monstrous form of Rudy Jones/Parasite.
  • His story parallels Barry's struggle surrounding the Crisis.
    • Both have lost their mothers.
    • Both have shortened lifespans, though while Barry is accepting of his destiny, Ramsey hopes to overturn his impending death.
    • While learning of his sacrifice propels Barry to save as many people as possible, Ramsay's inability to find a cure leads him to give up his goal of saving lives, putting saving his own life before others to the point of turning his back on his vow to "do no harm".

Behind the scenes

  • In the DC Comics, Bloodwork was an enemy of the Flash who had the power to control blood. His first appearance in the comics was The Flash #29 (October, 2017).
  • Sendhil Ramamurthy also portrayed a doctor/scientist on NBC's Heroes, Dr. Mohinder Suresh. His Heroes character also gained powers through injection that was missing an ingredient at first.
  • Ramsey currently serves as the main antagonist of the "Pre-Crisis arc" of Season 6 of The Flash.
    • Ramsey is the first "big bad" in The Flash to start out good and descend into villainy over the course of his arc, rather than having already been a villain prior to the start of the story.


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