[@OnlyThePie] Possessions are what your character has on them. They can be mementos of the family, like an heirloom. Once taken from your family you will not be allowed to return until after your training is completed.

[@Cat Sidhe] If your character is the son/daughter of nobility/royalty then I could see them having a title. As far as nicknames, I would think that since you've only been with the Riders for a week or so that they haven't given you a nickname. 

That said, if your character prefers to be called something else and that's how they introduce themselves than I could see that working.