(The trinket is actually a piece of a
Stand Arrow, the test Keco and the shrouded man put RMZX through was to make sure that he had enough determination and spiritual power/willpower to acquire a
Stand without being killed.
Stands are kinda like Personas only they kick a [parasitic bomb] load more ass depending on the ability. Each Stand has a certain ability or power (ie making zippers appear out of nowhere, turn into string, control sand, turn things elastic, and so much more) and are a reflection of yourself (The term Stand comes from the song Stand by Me) and as such are good with strategizing with the abilities of their particular stand.
Stands are amazingly powerful but there is a drawback to Stands, any damage inflicted on the Stand is inflicted on you and vice versa. If your or your Stand lose an arm the other loses their arm as well. Normally Stands can only be damaged by Stands but for the sake of the RP we probably should nullify that since well the bad guys don't have Stands. Stands can only be seen by Stand users, but for the sake of the RP they can be seen by those who use FRESCAs as well.
This video at around 2:50 could probably give you an idea or jump start as on of the guys in the video asks his viewers based on who they are, what kind of stand they would have.
[youtube]http://www.youtube.com/watch?v=pJm5T10XGN8[/youtube]
These are the
types of Stands that your Stand can be, though I don't recommend a Automative Stand because those Stands can operate on their own.
Here is a
list of Stands to get some ideas. Some are similar to others (ie Star Platinum/The World and Heirophant Green/Stone Free) but most are very different.
Notable Stands:
Star Platinum
Echos
Silver Chariot
Hierophant Green
Gold Experience (can heal but certainly wasn't designed for healing)
One thing to note, do not make a Stand that effects time, those are usually reserved for the Big Bad and Jotaro because Jotaro is [tornado fang]ing Jotaro.
If you want to go through this have RMZX cut by the Trinket, get nauseous and faint.)