Alright, powers will be called Stands. Whats a stand you may be asking. Well thats a fun question. 

Stands are defined as personifications of "life energy" whose abilities are given visual form. When first presented, the term is written as "Stand" (幽波紋スタンドSutando), with to change the pronunciation of what literally means "Ghostly Ripple" (幽波紋 Yūhamon) . However, the attachment to the has been discarded by early on. According to, the name "Stand" comes from the fact they usually manifest standing next to the User: ready to act. A Stand can also represent the manifestation of an individual's innate "fighting spirit" and embodies, to an extent, the individual's psyche. However, Stands may also derive through the exploration of possibilities and expression of the mind, in which case, only a large amount of mental strength is required. Beyond that definition, Stands present themselves in a large variety of forms and with different behaviors, if they are sentient at all. They follow a loose set of rules, with no definite standard by which one can fully classify them. As an embodiment of someone's psyche,  Stands are therefore as varied as human minds can be. Due to their diversity, Stands are not made equal. Some can be incredibly powerful due to their User's outstanding grit, others can be highly situational because of a defining quirk of character, or even detrimental to their User if they do not have the necessary fighting spirit. 

The Stand is created from someone's psyche, which includes not only humans but also other living creatures. That individual is referred to as the Stand User. The User then gives their Stand a name and uses it for various purposes. Unless bound to a specific object or automatic, Stands are attached to their User's body. In that case, any damage the Stand sustains results in an equivalent injury on the User's body and vice-versa. Exceptions to this rule include automatic Stands and bound Stands, which usually do not reflect the damage into the User, or special abilities like 's armor.

Except for rare occasions, when a Stand User dies, their Stand disappears with them. If a Stand suffers so much damage they are destroyed, the User dies as well. However, a User can survive with their Stand destroyed if the Stand is automatic or depending on the level of the User's injury. Inversely, some Stands can survive beyond their Users through exceptional abilities.

Since a Stand is the form of its User's psyche, they share an intimate psychic bond. First and foremost, Stands usually obey their Users' command without question. If a User demands it, the Stand will perform any task within its capacities, which includes attacking someone, defending the User, or any miscellaneous order. In the case a Stand is sentient, they can occasionally advise their User that an order is unwise but will carry it on all the same. Stands are also shown to protect their users in certain instances, such as when Jotaro tries to shoot himself, or Weather Report tries to commit suicide,. 

However, there are instances when a Stand cannot be controlled by the User. It can be either automatic like or the User can acquire a Stand but not have the fighting spirit to control it like . In both cases, a Stand can accidentally work against its user's interests through their unsupervised power. However, specifically in the second case, a Stand can go out of control and slowly kill its User like a disease. According to , the User becomes ill, then falls into a coma only to never wake up again; moreover, such occurrences are common enough for him to claim having witnessed many people succumbing to this.

One of the defining rules about Stands is that someone may only have one Stand (at a time). Although Stands may take different forms, or be split into several entities, no one is able to summon several Stands at once. Although exceptional circumstances may lead to someone wielding several Stands, only one will be the User's real Stand. A Stand generally remains attached to its User, but it can sometimes change Users. For instance, it can be stolen from its original User, or if the Stand's ability involves changing User. Thanks to 's , a Stand can change Users but will act to protect its new User instead. Others Stands, like or , will actively try to change Users, and their malevolent nature makes them harm their Users instead of protecting them.

Occasionally, a Stand can emit a , shouting repeatedly while delivering a beatdown.

 When a User acquires their Stand, their control over it is partly instinctual but needs practice.

When a User discovers their Stand, they usually do not know anything about it and thus has to figure out what their power is. Sometimes the ability is straightforward and easy to understand like 's , at other times a sentient Stand may explain the power directly to its User as did for , but sometimes the User will need time to know their Stand's power. For instance, both and possessed their Stands for some time until they discovered that they could stop time. Afterward, it is up to the User to discover what their Stand can really do with its ability. A Stand User will need practice to develop their Stand's potential and manipulate it in a more precise manner. Hidden subtleties and applications of the Stand's power may require time for the User to notice. , for example, had to use on in order to discover what its Life-Giving ability did to humans,and similarly had to figure out that its abilities could mend wounds.

To use a Stand, the User has to consciously summon it. Likewise, to use its power, the User has to command their Stand. Thus, Stand Users are still vulnerable to sneak attacks. This does not apply to automatic Stands which act by themselves.

In most cases, Stand Users are either born with their Stands or with the potential to unlock one later in life. Without this potential, a person can not achieve a Stand through natural means. For those born with it, the trigger for unlocking one's Stand varies with the user, but is, as mentioned, usually derived through intense mental strength. As such, Stands' abilities are typically unleashed during times of stress or conviction. The most widespread way to acquire a Stand is to be pierced by a special made of an otherworldly meteoric metal. If a person has the potential, they will survive being stabbed and acquire a Stand. Otherwise, the person will die. Notable people who acquired their Stand this way include , , ,, and . However, if a person is pierced by the Arrow and does not have the potential, but is healed afterward, they will gain a stand.

Moreover, if someone acquires a Stand this way, their existing descendants will also gain a Stand, although it may not manifest itself at first or be uncontrollable. In one such case, 's body was pierced by the Arrow, causing every living member of the to awaken their own Stands. The way siblings acquire Stands is portrayed inconsistently: although awakened a Stand, his sister did not; however the twins and both awakened a Stand when Pucci was pierced. If a childless person acquires a Stand, their future children will have at least the potential of developing a Stand. 

If you have any questions (And you probably do) Feel free to comment any questions! Ill be glad to answer them!