The 'seller' group
These nouns refer to a person who has or may have a particular role in a situation. This use is productive.
addressee beholder buyer culprit favourite injured party seller sender speaker underdog winner
And, as the staff were temporary, they could not now be traced so it was not possible to identify the culprit.
The seller had been willing to go as low as £90,000.
You are the kind of person who champions the cause of the underdog.
The winner will receive $2500.