Emil’s Teachers
During the entire timeline of Herman Hesse’s book Demian, the main character Emil Sinclair experiences development, growth, and evolution. However, he would not have developed to mature personality unless several other characters of the book helped him accomplish this goal. The three main Emil’s mentors or teachers were Demian, Frau Eva, and Pistorius. 
Max Demian is surely the greatest Emil’s inspiration. Although Demian was an outcast of the society, he personified the best traits and qualities of a man for Emil. Demian led Emil through his problems, and watched him make decisions. The main purpose of Demian was to help Emil Sinclair break free, get mature, become independent, learn to make his own decisions, and act according to his own desires. He was watching Emil during almost all the story, and only left him when his major role was fulfilled, - when Emil Sinclair learned how to think differently and act independently. 
Emil Sinclair view Demian as someone special, some divine being that is worth listening and following. He would never criticize Demian, or point to his errors. Instead Sinclair humbly perceives the tremendous spiritual help of Demian even when Demian is not around. Thus, Demain played the primary role in the development of Emil Sinclair. 
Besides Demian, there was another character in the book that had a significant influence on Sinclair and his mind. Frau Eva, Demian’s mother, is portrayed both as caring and sensitive mother, and the source of passionate romantic love. She serves as Emil’s ulterior goal, and when they met Sinclair identified her as his source of romantic love. She cared and loved Emil, exhibiting her tender feminine characteristics. However, at the same time she possessed masculine characteristics too. Just like Demian’s, her primary goal was to help Emil develop, grow and become independent. And she led him along and exhorted him to become self-confident and independent by being very strong and commanding. 
Ultimately, Frau Eva symbolizes romantic love, and at the same time caring mother, she is gracious and feminine, and at the same time she is strong, commanding, and masculine. She is the symbol of completion and perfection, and Emil Sinclair learns from her just like from Demian. Therefore, Frau Eva is the second most significant character that influenced Emil’s development and growth; she is Emil’s second teacher.  
The third character that also influenced Sinclair’s development is organist Pistorius. When Emil’s major mentor was absent from his life, Pistorius took Demian’s role and led and taught Emil. He told Emil about god Abraxas, which interested Sinclair much. Before they met, Emil secretly watched Pistorius play organ in the boarding school.
Generally, the idea of relationship between mentor and follower is the central concept of the book. We see how Emil Sinclair grows from a little boy who cannot take decision on his own, into a mature personality. However, the key concept of the book is that Emil Sinclair did not go through the path alone; he did not come to the correct solutions on his own. Rather, several other characters helped him and watched him grow. They served as mentors for Emil; Demian was the primary and the most important mentor, which is most probably why the reason for thr book’s title. He led the main character from the beginning of the book up until the moment when his goal had been completed. His mother, Frau Eva, the second most significant teacher of the book, personified romantic love and motherhood, masculinity and femininity. Finally, the third mentor emerged when Demian was not there for Emil. Organist Pistorius was also Emil’s mentor, although less significant than Demian or his mother.