同伴者

1. Origins, structure, and basic meaning

• Structure: 同伴者(どうはんしゃ) adds 者, person, to 同伴, accompanying someone.
• Basic usage: It identifies the person accompanying the main attendee in contexts such as event admission or registration.

2. Common pitfalls and similar expressions

• Accompaniment rather than relationship
  • 本人と同伴者 distinguishes the main person from their companion. 同伴者 alone does not identify a spouse or family relationship.
• まで sets an upper limit
  • 同伴者一名まで limits the number of companions to one. It does not require bringing exactly one companion.