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Sonic News Network
Sonic News Network
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This character exists primarily or exclusively within the Sonic X continuity.
Information in this article may not be canonical to the storyline of the games or any other Sonic continuity.

Doctor Kai Narasu used to be a name that had respect! I was a leading professor of biological studies! When you appeared, I based my career on a paper proving you had to be a robot. When you had the gall to be a living being, I was laughed out of the university! I lost my tenure! I could no longer research my chimera projects! I lost my funding! All because of you!

— Dr. Kai Narasu, Sonic X #23

Doctor Kai Narasu is a character in the anime series Sonic X and its comic series published by Archie Comics. He was once a respected zoologist and a leading professor in biological studies, but when Sonic the Hedgehog appeared in Station Square, he wrote a paper and made an official statement on television that the hero was actually a robot, since no living being was capable of achieving such high speeds. However, when his theory was proven wrong, he became a laughingstock, losing his job and reputation. He soon joined the S.O.N.I.C.X. organization to get revenge on Sonic for getting him fired and making him lose his dignity.



New World Saga

Dr. Narasu and animals

Dr. Kai Narasu is seen in a news broadcast about Sonic, proposing that Sonic is actually a machine, since no living being on Earth can reach such a high speed.[1]

Archie Comics

Dr. Kai Narasu first appears in the comics as a S.O.N.I.C.X. member. They captured Sonic and brought him to their base on the abandoned Prison Island. They all introduced themselves, shared their stories of how he "ruined" them and told him that they were united by the Organizer. Sonic broke into laughter at the group's name, believing it sounded like the name of a fan club. He swiftly broke out of the base with little effort, despite them sending their robots and Li Yan's gang after them. They then told the Organizer of how their first mission was a failure, but he assured them that next time will go much better for them.[2] Narasu creates organic multi-colored clones of Sonic to create havoc around the city, therefore laying the blame on the original, but they are all accidentally made in different colors, which makes the citizens think they are related to Sonic, although not the original himself. Narasu tries to perfect his clones throughout the Issue, but Sonic tricks Eggman into destroying the clones which were already made. He discovers who fabricated them and rushes to Prison Island to interrogate the group, but Narasu releases a recent clone (which comically resembles Classic Sonic) and they start a fight, which wrecks the entire laboratory, and causes a huge smoke cloud. The other members arrive and see a silhouette on the smoke, and believing it to be the real Sonic, they open fire with their laser guns. But much to their shock, they accidentally destroy the clone while the real Sonic escapes unharmed.[3]

Narasu creates a plan to reveal Sonic as "the monster that he is" by injecting him with a mutagen (which Jerome Wise at first confuses for grape juice). He injects the serum into six darts, but they find Sonic battling Eggman, which causes Narasu to mix five of his six shots. Sonic spots them and runs away, but Hector Dragg and the scientist chase after him on Dragg's motorcycle, only to miss him after a few minutes. They find him again on the Chaotix headquarters and try to shoot him for the final time, but the dart bounces off Charmy Bee's helmet and hits Vector, turning him into a giant.[4] Sonic and Espio find the duo outside and interrogate them about what they did. Narasu refuses to give any information aside from the serum's purpose, but Espio suggests that they use an "ancient ninja remedy" to cure Vector. They leave Charmy behind to watch them, but they easily escape after distracting him with the "look over there" joke.[5]

Dr. Kai Narasu schemes another plan for Sonic, but after seeing Shadow the Hedgehog alive once again, he abandons the plan almost immediately.[6]


Dr. Kai Narasu is somewhat similar to Dr. Eggman in a few aspects: although he has quite a high intellect, he is still a dimwitted man whose plans can be easily foiled. He also has a similar short temper and arrogance, getting extremely irritated when contradicted or ignored. Also similarly to Dr. Eggman, he takes great pride in his intellect and tends to brag about his inventions and accomplishments. Despite his intelligence, Narasu is petty and irrational. After getting fired for being wrong about saying Sonic was a robot, he blamed his humiliation and ruined reputation on the hedgehog for "having the gall to be a living being" instead of accepting responsibility for his mistake. Narasu wants to destroy Sonic above anything else. Like most members of S.O.N.I.C.X, Narasu believes that he is a good guy and Sonic is a menace. At one point, he even called Sonic a villain.

Powers and abilities

Dr. Narasu is a brilliant scientist, specializing in genetic technology. He is able to create dangerous inventions, such as a machine that can create clones of Sonic (albeit flawed ones) and a mutagen which, when injected into an organic creature, causes them to grow to colossal size.


  1. Masaki, Hiro (13 September 2003). "Sonic to the Rescue". Sonic X. Season 1. Episode 2.
  2. Sonic X #23, "Hedgehogging Their Bets"
  3. Sonic X #25, "The Color Sonic"
  4. Sonic X #38, "Big Trouble in Little Station Square! Part One"
  5. Sonic X #39, "Big Trouble in Little Station Square! Part Two"
  6. Sonic X #40, "The End!"