attendant - noun

someone who waits on or tends to or attends to the needs of another

a person who is present and participates in a meeting

an event or situation that happens at the same time as or in connection with another

attendant - adjective

• being present (at meeting or event etc.)
• following or accompanying as a consequence

attendant - thesaurus

accompaniment   accompanying   attendee   attender   concomitant   consequent   ensuant   incidental   meeter   resultant   sequent   tender