Which characters know about Saitama’s time travel?
The following contains spoilers for One-Punch Man Chapter 167, “Dawn,” by One, Yusuke Murata, John Werry, and James Gaubatz, available in English via Viz Media.
One-punch man is renowned for its unique take on the superhero concept and its goofy, over-the-top storytelling. Even so, the manga’s recent developments have always caught readers off guard with their unpredictability. Saitama pulled off the impossible and saved everyone with a powerful new technique. With a seemingly massive downside, however, these developments also raise new questions – including which characters are actually aware of Saitama’s time travel feat.
After Saitama defeated Garo, the Hero Hunter asked his greatest rival to copy his abilities and destroy their dark future. Saitama agreed and, in combination with his greater than ever power, managed to create his Zero Punch technique. He traveled back in time, punched past Garo, and erased the future where most of the characters had died. While his newly conceptualized skills are second to none, they didn’t come without a downside.
Right after being sent back to his past, Saitama seemed to retain his memories, even commenting that Genos was alive. However, while he was able to identify Genos’ core, he couldn’t remember why he was holding it. Intrigued, Genos picked up the core and connected it to himself, bringing his memories back to his mind. Because Saitama held Genos’ core close to his heart during his entire fight with Garo, Genos learned of the titanic event in full.
When the cyborg attempted to summarize his hypothesis to his master, Saitama’s brain shorted out, causing him to lose interest; he immediately changed the subject to stop the cyborg from continuing. They then moved on and joined the others in deciding the fate of the fallen Hero Hunter, then watched as Metal Knight’s army of machines rose from the ground and took charge of the cleanup. In the end, Saitama told Garo to have Dr. Kuseno repair his limbs before gathering materials for their house.
Obviously, Genos has a full account of the future that has been erased. Since he’s likely to report to Dr. Kuseno, he’ll also likely let the right doctor examine the core of his future self. As such, the doctor can also learn the whole truth. He might also find a way to project the core’s memory, which will likely be watched over by Saitama and the entire gang. If Dr. Kuseno invented such a device, it is possible that Saitama’s strength will also be shown to all characters in Man with one fist.
Besides Genos, Blast and company may have also retained their memories since they specialize in dealing with the gods and their divine powers. Even if they don’t remember everything, their minds may contain lingering memory fragments. Of course, the mysterious gods are also probably aware of everything that happened. After all, it was their divine powers that made time travel possible.