mentor
experienced guide
Today this word meansSomeone who guides you by experience.
The name of Mentor, the friend to whom Odysseus entrusted his son when he left.
It became a common noun after 1699, when Fénelon's novel The Adventures of Telemachus became a sensation across Europe.
Worth noting
In the scenes of decisive counsel, it is actually Athena borrowing Mentor's form. The real mentor, as it turns out, was a goddess.