attender

noun3

1. •
   An attendee; one who attends a course, meeting, school, etc.

   • She was a very constant attender of First-day and week-day meetings, at the meeting places she belonged to — 1850
2. •
   An attendant; one who attends to someone or something.

   • Sri C. Rajabather was appointed to assist in the office as typist attender from 7-4-41. — 1969
3. •
   The subject; one who experiences.

   • the whole process of ages’-long mentalization, of which our present ability of conceiving “Mind” forms only the culmination, and by no means the constant attender. — 1873