Am I Forgetting Anyone Important?

Govinda- Siddhartha's best friend, sidekick, and follower. Although they share a strong bond, their epistemologies differ in that Siddhartha tries to find Self by himself, while Govinda consistently follows the teachings of other people (Siddhartha and then Gotama). Basically, Siddhartha attains his own data on his search for the truth, while Govinda is content to believe what others tell him if their data seems valid.

“No, a true seeker, one who truly wished to find, could accept no doctrine. But the man who has found what he sought, such a man could approve of every doctrine, each and every one, every path, every goal; nothing separated him any longer from all those thousands of others who lived in the eternal, who breathed the Divine.” 

Kamala- A courtesan who becomes Siddhartha's lover after he leaves the ascetics. She teaches Siddhartha about physical love in the existential world, a binary to the spiritual fixation that he has been experiencing while living in the woods. As she teaches him, he also experiences an addiction to economic wealth as well as gambling rather than the spiritual riches he was previously seeking. While both Kamala and Siddhartha have knowledge, their experiences differ greatly, and therefore their categories knowledge are completely dissimilar. Her gender accounts for a great deal of who she is as a character and influence on Siddhartha, since she is the only significant female in the text.
“It is good," he thought "to taste for yourself everything you need to know. That worldly pleasures and wealth are not good things ... I knew it for a long time, but only now have I experienced it. And now I know it, I know it not only because I remember hearing it, but with my eyes, with my heart, with my stomach. And it is good for me to know it!” 

Gotama- also known as Buddha, this character is said to have found Nirvana. He has many followers who listen to his ideologies, and Govinda becomes one of them, causing him to leave Siddhartha on his own. He undoubtedly has knowledge and wisdom, but Siddhartha doubts that he will be able to convey these traits to him effectively, which is why he declines becoming a Buddhist follower.

“Thus Gotama [Buddha] walked toward the town to gather alms, and the two samanas recognized him solely by the perfection of his repose, by the calmness of his figure, in which there was no trace of seeking, desiring, imitating, or striving, only light and peace” 

Vasudeva- A ferryman who teaches Siddhartha that he need only to learn from the river in order to attain Nirvana. Vasudeva is of a different class of people than Siddhartha has previously communicated much with, and his simplistic and passive view of inner peace proves to be more profound than anything Siddhartha had ever known before.

“They both listened silently to the water, which to them was not just water, but the voice of life, the voice of Being, the voice of perpetual Becoming.” 

“The river is everywhere.” 

Language of Interpretation that you haven't seen before:

Existential

As contrasted with essence, the belief that actual life is consciously created by actors

Economic

An adjective that describes production and management of goods and services; financial underpinnings of wealth

Gender

An individual's male or female status; issues related to female or male status

Ideology

Sets of ideas of given material interests that benefit a definite class or social group

Class

A category of financial status relative to the entire population; a division according to social and/ or economic status; classism is a set of attitudes, actions, or institutional practices that subordinate people because of their economic condition.