Who comments on forgetting actions that do not fit one's chosen character?

The correct answer is Paul Dempster. In "Fifth Business," Paul Dempster engages with the theme of identity and the dissonance between one's actions and self-perception. He reflects on how individuals often forget or suppress actions that do not align with the persona they wish to project. This concept is significant in the novel as it highlights the struggles the characters face in reconciling their true selves with the roles they play in society.

Paul's character serves as an example of someone who grapples with the complexity of identity, shaped by external expectations and personal experiences. His perspective opens a discussion about the ways individuals can compartmentalize their lives to maintain a cohesive narrative around who they believe themselves to be. Other characters, while they may also relate to the theme of identity, do not focus on the act of forgetting actions in the same explicit way as Paul does. His insights thus stand out in the exploration of how individuals navigate their identities in relation to their past actions.