Stand

In the Purple Kingdom, stand users are sparse. Most are knights granted stand abilities by the current monarch. The monarch of Purple Kingdom holds in their possession a sword made out of the same material as the stand-creating arrows. The monarch knights someone by the usual way, the only difference is they use the sharp edge of the blade to cut a tiny nick in each shoulder of the new knight. The knight will then fall ill, and eventually either die or return to health with an acquired stand ability. Some exceptions are rare though. For example, the elderly knight known as Barzon Willy, gained the ability to see stands yet never got a stand of his own.
Stand users in the Purple Kingdom are referred to as those protected by "guardian angels" or simply "spirits" (never referred to directly as 'Stands'). In the case that someone has a stand, but is not a knight, holy person of the Church, or otherwise not in direct favour of the monarch, they are considered to be a witch/wizard or pagan possessed by "demons" or "malevolent spirits". These people are often prosecuted, brought forth for the typical witch trials (ex. burning at the stake, drowning in a lake). 
For visitors with stands from other civilizations; depending on their actions, they may/may not be treated as pagans.
For more info, visit the main JJBA page:
https://jojo.fandom.com/wiki/Stand