noun
A person who leads or shows the way, especially on a tour or to a destination. Neutral term; can be used for professional guides or someone informally showing the way.
ツアーの案内人が歴史的な建物を説明してくれた。
The tour guide explained the historical buildings to us.
We recommend hiring a guide for the mountain trail.
案内係 refers to a receptionist or information desk attendant, often in a fixed location. 案内人 implies a person who accompanies and guides, especially outdoors or on a tour.
Compound of 案内 (guidance, information) and 人 (person). The word 案内 itself derives from the kanji 案 (plan, proposal) and 内 (inside), originally meaning to show someone inside or to lead the way.