Final answer:
Abongo values his humanity and dislikes being symbolized in a way that reduces it. His reaction to the conversation about Conrad indicates pride and self-respect.
Step-by-step explanation:
Based on the provided dialogue, we can infer that Abongo's personality is one that values his own humanity and identity. He seems to be a character with a strong sense of self, who does not appreciate being used as a symbol if it means diminishing his humanity. Abongo's upright posture in reaction to the conversation about Conrad suggests a sense of pride and possibly a defensive stance in the face of an argument that he perceives as reductive of his identity.