YMMV / Dr. STONE reboot: Byakuya

• Adorkable: Rei is a cute zero-gravity flying robot, with an extensive knowledge of Weekly Shounen Jump's intellectual properties and anniversaries, but not much knowledge in social interactions or average human life-spans.
• Big-Lipped Alligator Moment: Rei captures an extrasolar comet, which contains an alien behemoth trapped inside. The event is never mentioned again or clarified, and Rei views the discovery as a source of organic material to help maintain the ISS. Rei's reaction is justified, as it is a robot without human common sense and prioritizes maintaining the ISS for Byakuya and the other Astronauts over anything else, but the event is still out of place in a series that is almost 100% grounded in reality.
• Fandom-Enraging Misconception: This story is not canon to Dr. STONE. Asking "when is Senku going to meet up with Rei?" is a good way to annoy fans.
• Harsher in Hindsight: In chapter 3, Byakuya reveals that the robot he and Senku built, Rei, has most of humanity's knowledge stashed inside it, but lacks common sense circuitry. Darya than asks the robot how old it thinks it is and it replies "One Thousand Years Old", much to Darya's chagrin. Shamil then comments "Geez Byakuya, you could have told your robot how much the average human being lives". By the end of the spinoff, Rei is still functioning 3700 years later^note "waking up" in its new android body on the same day Senku frees himself from the stone and still believes Byakuya is alive.
• Hilarious in Hindsight: The comet with a giant trapped alien feels to some readers like an oddly fantastical direction to take the series into, but it's just a What If? story... And then the Why-Man in the main story turned out to be the petrification devices themselves, who are sentient and of alien origin.
• Nightmare Fuel:
  • In chapter 8, Rei witnesses a meteor strike Italy, effective wiping it off the map and destroying all life in Europe ("All of Europe turned gray" as Rei puts it). And then Rei finds out that an even ''bigger'' meteor is set to strike Japan in 500 years.
  • That same chapter dips into Cosmic Horror Story territory when Rei intercepts a comet from outside of the solar system to mine for resources, and upon closer inspection notices what looks like the body of a gigantic space dragon◊ frozen inside it. For scale, a human-sized spacesuit only looks to be as big as its eye.