The character in a literary work is one of the important elements that shapes the plot and theme of the work. It has a profound impact on the value and significance of the work. However, the character's personality could also have a negative impact on the plot and theme of the work. Here are some examples of possible reactions: 1. The character's personality is too prominent and exaggerated, which may make the work seem exaggerated and fake, and reduce the credibility and realism of the work. 2. The complexity and variety of characters may make the work difficult to portray and understand, reducing the reader's sense of immersion and resonance. 3. The conflicts and contradictions of the characters may make the work complicated and chaotic, reducing the fluency and cohesiveness of the work. 4. If the characters are too consistent and monotonous, the lack of variation and depth of the work may reduce the artistic appeal and meaning of the work. When discussing the counter-effect of the character's personality in literary works, we can analyze the plot and theme of the work and explore the influence of the character's personality on the plot and theme, so as to explore the limitations and shortcomings of the character's personality and how to shape the character's personality in other ways to make the work more perfect and artistic.