noun
A person who shows the way or leads others, such as a tour guide or an usher at an event. Often interchangeable with 案内人, though 案内者 can sound slightly more formal or written.
See also: 案内人
博物館で案内者に展示の説明をしてもらった。
We had a guide explain the exhibits at the museum.
式場の案
An usher at the ceremony hall showed us to our seats.
Compound of 案内 (guidance) + 者 (person). The exact historical derivation is uncertain, but the word follows a standard Sino-Japanese pattern for forming agent nouns.