"Me? Oh I just make plants into CARS... No biggie." - Karakuri Kitsune
That's right!
He works at a place called "Project Botanica" which is essentially a 50 000 square km garden growing anything from Organic Food, Flowers and Hemp, an Earthly Paradise. The garden feeds a total of over 500 000 000 people every day. However Karakuri is employed in a workshop along with countless other workers which uses flowers and hemp to build fully working cars of amazing performance:
- Unlimited Range under a specified speed
- Self fueling
- Self Cleaning
But there is a catch, to build a new car from scratch takes a minimum of 40 years. This is because the actual assembly is done by Mother Nature. The crew select the most ideal plants and flowers then position them perfectly for the job they will be performing, then leave them for a year or two to fuse.
That means when the car is completed it is essentially a living breathing biological organism, a plant.
Fuel for the engine is usually provided by flowers in the form of Nectar.

Karakuri helps by helping the rearrange the iron in the plants diet. This is to increase the integrity of the vehicle but not to negatively effect the plants health. He is also involved the design, testing, driving and customizing of the cars.

While playing with metal one night, Karakuri began testing the concept proposed by Alchemists, the idea that any material can be turned into Gold or Silver. After hours of testing he managed to rearrange the atoms in a scrap piece of rusted metal to a 1.2 ounce Gold nugget that was 99.998% pure, but he soon noticed a problem, a massive problem. It was the result of him braking the Strong Nuclear Bond in the atoms and making larger nuclei.

ART NOT BY ME!
This is a freebie by the lovely  Sessinoga! Thank you!