Who is the other time Traveller in Tokyo Revenger?
Without many people guessing, it turns out that the other time-leaper besides Takemichi is Haruchiyo Sanzu. Although for now we still don't know what later became Sanzu's motivation to time travel, but there is a possibility if Sanzu also went to the past to save Mikey, who he already considered a king or leader.
There was likely another time-leaper, one who came from Takemichi's own time and worked to reverse every progress the Cry-baby Hero made. This person is also likely to be Hanma.
Kisaki has shown the he can be extraordinary intellectual throughout the story, being able to foil Takemichi's plans multiple times despite the latter being able to time travel. He has been able to ingeniously manipulate countless powerful delinquents to do his bidding and serve as his stepping stones.
While Takemichi's time travel ability grants him the miracle of being able to change the past, it also places a lot of restrictions on how he can use his power. Since his time travel ability always sends him back in time exactly twelve years, this means that he is unable to affect any events that occur before then.
Kisaki would later achieve his goal of becoming the number 1 criminal in Japan, and he proposed to Hinata. However, Hinata refused his proposal, which prompted Kisaki of killing Hinata. Yup, the main reason that made Kisaki so evil is his obsession with Hinata and his jealousy of seeing her with Takemichi.
He shot him to push Takemichi away for his own good and when this didn't work, he intended to sacrifice himself. But Takemichi became the one person in Mikey's life that refused to leave him or let go of his hand.
Mikey Is The Second Time Leaper!! Tokyo Revengers Theory - YouTube
During this arc, the protagonist of Tokyo Revengers, Takemichi, asked Kisaki Tetta if he was a time leaper. This was the moment that every fan had been waiting for. The manga confirmed that Kisaki was not a time leaper, but he was aware of the concept of time leaping.
Manjiro "Mikey" Sano is the deuteragonist-turned-final antagonist of the 2017 Japanese manga series Tokyo Revengers and its 2021 anime adaptation.
Naoto Tachibana
Naoto is the sole person in the future who knows of Takemichi's time leaping abilities, and thus tries to help him by supplying him information about Toman. The two become friends because of their shared desire to save Hinata from her untimely death.
What if Takemichi dies in the past?
If either is dead, then Takemichi is effectively stuck in the past no matter how many times he shakes hands with the person in the present. When this happens his only means to return to the present is by changing the timeline so that both people will live in the present.
1) Mikey (Sano Manjirō)
The "Invincible" Mikey, is a well-deserved nickname for the strongest character in Tokyo Revengers. He is the leader of Toman in the past, and the leader of the Kanto Manji gang in the future. No matter how strong or large the opponent, Mikey has never lost a fight.

Takemichi finds out that Draken is on death row because he committed murder and asks Draken how this happened, as well as what happened to Toman. Draken says he does not regret his actions, and that he knows he deserves to be in prison, as the current state of Toman is because of him not stopping "that one guy".
The protagonist of Tokyo Revengers decided to go back in time to save Mikey despite every single person leading a normal and a happy life. Many fans had mixed opinions on this. However, Takemichi ended up saving Hina, but he went back in time to save Mikey.
After missing Takemichi with their first shot, the members of Rokuhara Tandai fired a second shot in the hopes of finally killing him. Instead, Draken was in front of Takemichi, taking the fatal blow. Draken's death was confirmed by paramedics in Tokyo Revengers Chapter 224.
On one of Takemichi's trips back to the future, he and Naoto were ambushed by a corrupt Toman, led by Kisaki. Even though they tried to run away, Kisaki was able to find them again, pointing a gun at Takemichi. Before Kisaki was able to shoot Takemichi, Naoto pushed our hero and received the bullet in his place.
During a strange encounter, Kisaki tells Takemichi that he failed to save him. In one of the alternate timelines of the present, Kisaki is about to shoot Takemichi when much to his surprise, Kisaki calls him his hero.
Summary. After Kisaki's firing is announced, Toman reacts in confusion. Chifuyu tells Takemichi that although he informed Mikey of Kisaki's betrayal, he did not expect Mikey would fire Kisaki, as he was a high-ranking captain.
Takemichi possesses a supernatural skill that allows him to time travel. However, he is only able to travel back exactly 12 years. Also, whenever he is in the past, the present timeline does not stop, but keeps going for however long Takemichi is in the past.
Akkun then recalls the time when Takemichi fought with Kiyomasa and after they left, they ask the question to each other what will they say to each other if they meet up again after separating ways, Akkun turns to Takemichi and reveals that he is the one responsible for pushing Takemichi to the tracks.
Is Mikey a villain?
Manjiro "Mikey" Sano is the deuteragonist-turned-final antagonist of the 2017 Japanese manga series Tokyo Revengers and its 2021 anime adaptation.
However, Takemichi keeps getting pitted against stronger and stronger opponents, and often gets beaten within an inch of his life. One of Takemichi's most admirable qualities is his ability to persevere.