Pink Mochi

He was born on August 19th, and his favorite food is the Monster Energy drink, flavor unspecified. His most treasured belonging is his Suzuki GSX 1300R Hayabusa (a Japanese motorcycle brand).

That specific model has had multiple releases over the years. Of course, it's highly likely that he's had his for longer than a year, but for reference, the one released in 2013 weighed 586 lbs when accounting for its fluids, and its speed maxes out at 184.49 miles per hour. The manga chapters depicting Episode 14 set the date to June of 2013, so give or take, this is a pretty good estimate of what his motorcycle can do.

Being able to maintain it and steer it at that weight at age 15 is amazing! Don't underestimate this guy's strength: he's displayed it at least twice during the original series (three times if the motorcycle he rode was the Suzuki Hayabusa described above) that I can recall. In the extras, Koro-sensei himself said that if he could integrate motorcycles into math, Yoshida's grades would likely see improvement!

He's not just the motorcycle guy. His character profile states that his hobby is tinkering with vehicles in general, not just motorcycles. So that knowledge about motorcycles? Yeah, he can apply that to other vehicles, too! He was also in the Railroad Research society before he was booted to Class E.

Here's a teeny ramble about antimatter and Koro-sensei! I found out antimatter explodes when it comes into contact with matter. Specifically, I encountered a physics problem, and the answer showed that if an astronaut landed and touched an antimatter planet, both the astronaut and an EQUAL amount of antimatter would be annihilated (although the surrounding antimatter area of the planet would be heavily damaged from the explosion).

But the point is this: 30.6kg of human matter comes into contact with 5.9722x10^24 kg (that's earth's mass) of antimatter planet. 30.6kg of human matter + 30.6kg of antimatter planet is annihilated, leaving ZERO TRACE. They cancel each other out. The remains might be uninhabitable and invisible to the human eye, but it's still there.

What if it was reversed? 30.6kg of antimatter human (I calculated it, it's not a guess) comes into contact with the planet earth. 30.6kg of Earth will be annihilated, leaving no trace. There will still be at least SOME trace of the area outside of the radius, although it will most likely be uninhabitable and likely too tiny to be visible.

Now think: Koro-sensei, an antimatter being, constantly comes into contact with matter. AIR is matter (yes, I checked)! So one breath, and he should've exploded before episode 1. How has he not exploded? There must be an invisible barrier separating the matter from antimatter. I did brief research on antimatter storage and couldn't grasp most of it, but what I did somewhat grasp is this quote from Ruichen Zhang: "Antimatter shouldn't contact any matter while it is stored. This would be done by using the property of spin magnetic moment, which antimatter has. Using magnetic and electric fields, a force is applied to the antimatter, which directs it away from any matter" (Zhang).

So boom. Basically, an electromagnetic field serves as a barrier between matter and antimatter, and the latter is what fuels it. I researched the epidermis of octopi, which is the most sensical place for the barrier to be if it exists, considering Koro-sensei can interact safely with matter objects with his tentacles, especially the matter present in his clothes that come into direct bodily contact with him.

So I labelled a diagram of an octopus' skin layers to explain it. But it's not just his skin: his tongue is immune to anti-sensei material, which is made to destroy antimatter only, and he breathes without blowing up the earth via contact between his lungs and oxygen (oxygen is matter), so at the very least, the outer layers of all of his internal organs can't be made of antimatter.

References

HEADCANON: Terasaka looks like the kind of guy who owns a big, scary-looking dog, but this guy is actually a kitty person!

There was a time when he deliberately committed minor crimes (kicking the fire hydrant for attempted destruction of public property; doodling vulgar drawings on the police station's glass door with a dry erase marker for vandalism) and turned himself in to Kimura's dad because the punishment was always a few hours of community service at the animal shelter.

See, Terasaka couldn't be seen going to the shelter for fun: he has a reputation to keep! So he had to have a reason to be there, and that was all he could think up on short notice.

But there was a catch: if the crime was too severe, his parents would be called. After a lengthy grounding for throwing a rock at the lights on a police car ("Come on, Mom, Dad! I meant to hit the back window, not the lights!") ("Keep on digging that hole there, son.") he quickly learned to stick to the minor crimes mentioned above.

Mr. Kimura caught on within the first two weeks because Terasaka was neither bright nor a good actor, and the two made an unspoken agreement that any time Terasaka wanted to go to the animal shelter, he could doodle (non-obscene) things on the front door of the police station with a dry erase marker (because Terasaka didn't want to waste time scrubbing at permanent marker when he could be playing with the kittens *cough* *cough* er, I mean, cleaning the litter boxes and kennels).

Oh, and did I mention he managed to develop a totally-not-bullshit dog allergy on his first day of community service as soon as the receptionist said the people at the dog kennel needed help?

Yeah, he didn't come here to snuggle with the barking, wiggly dogs, thank you (no offense to them! They're just not his preference!).