Guider (noun)

1. A person who leads or directs others, often in a specific activity or field.
2. A person who helps others by showing the way or providing instructions.

Origin:

From guide, someone who shows the way or leads.

Examples:

1. The guider led the group on a hike through the mountains.
2. The guider was an experienced traveler and knew the best places to visit.
3. The guider provided instructions on how to use the equipment.
4. The guider was a helpful resource for the new students.
5. The guider was a trusted advisor for the company's clients.