Mentor
A mentor is an experienced and trusted adviser
Guru
The word guru means"teacher" in Sanskrit. The English it means "the imparter of knowledge".
A traditional etymology of the term "guru" is based on the interplay between darkness and light. The guru is seen as the one who "dispels the darkness of ignorance".
Guide
A guide is a person who advises others, especially in matters of behaviour or belief

Choose your word, for each person it will be different because each person is an individual who is on their own personal journey. Jungle is merely there to assist you on that journey.