Attention: Contents on this page is the original consideration by the administrator of this site. Also, the administrator is Japanese and not good at English, so it may be difficult to understand detail.
The "Arrow" that appears in Part 4 of JoJo has a function to pull out a Stand from a human, etc. Its principle is really simple. Normally, the "human mind's power" cannot affect directly to the "material world". In other words, there is a "wall" between the two. the Arrow is a tool that makes a hole in this wall so that the human mind's power can affect directly to the material world.
For Keicho Nijimura, a battle using Bad Company is the same as a "game of chess". Even in the battle with Josuke Higashikata, he steadily advances his infantries and other pieces, destroying Josuke's one arm and one leg like capturing the opponent's pieces in chess, and leisurely checkmate. However, Josuke uses the "shogi" rule of repairing the destroyed Bad Company's missiles and uses them to check King Keicho, and as a result, Keicho lost at the end.
Chef Tonio Trussardi's stand Pearl Jam is a stand that absorbs the spiritual power that dead creatures leave in the earth as nourishment, condenses it, and transforms it into fruit-formed stands. Tonio cooks this fruit stands with other ingredients, and the finished dish exhibits extraordinary medicinal properties due to its condensed spiritual power.
In the world of JoJo, where spiritual power exists, a "craftsperson" who has devoted himself to mastering a single skill may awaken to the Stand ability as a spiritual skill that transcends physical limits. Pearl jam by chef Tonio and Cinderella by esthetician Aya Tsuji are examples.
The essence of Rohan Kishibe's stand Heaven's Door ability is to treat other person like Rohan's manga character. As a result, Rohan gets the authority to read the information recorded in other person's bodies like a "character settings book" and the authority to add new settings to it.
In the world of JoJo, where spiritual power exists, there are "Earth Spirits" born from spiritual power on the earth. However, their presence is so weak that even a stand user's spiritual eyesight cannot see them. However, Shigechi can see them, and can give them stand energy to turn them into stands. That's his stand, "Harvest", in other words, Harvest can be said to be the ability to feed the Earth Spirits to work.
Aya Tsuji's stand "Cinderella", which changes the fortunes of customers with beauty techniques, is explained as having "time limits" and "conditions to maintain ability". But that's lies, and she's using her stand ability that way on purpose. Aya Tsuji thinks she should use her magical powers like a wizard in a fairy tale, and she tells a lie as a way to test the seriousness of her customers.
In the dice game "Cee-lo" played by Rohan Kishibe and Josuke Higashikata (and self-proclaimed "alien" Mikitaka Hazekura), the triple number of 6 was called "Omen". However, this is a unique name in JoJo and is not very common. By the way, Omen is famous for a movie in which a series of ominous accidents occur around a boy with a birthmark in the shape of "666", and for some reason, Rohan's house is also half-burnt.
Yoshikage Kira can set the "easiness of blast" for Killer Queen's bomb, if the setting is loose, it will blast just by touching something. Conversely, if the setting is tight, it will never blast until the ignition switch on Killer Queen's finger is pushed. "Touch Ignition Bomb" and "Remote Ignition Bomb" used by Kira for Stray Cat's Air bullets in the final battle of JoJo Part 4 are also based on this settings.
