Which character is described as being very bright but also nervous?

The character described as being very bright but also nervous is Sticky. Throughout the story, Sticky is showcased as exceptionally intelligent, with a remarkable ability to absorb and retain information. His intelligence is often evident in how he solves problems and contributes to the group's strategies. However, his nervousness manifests through his anxiety in social situations and his tendency to worry about the outcomes of their endeavors. This combination of brilliance and anxiety makes Sticky a relatable and well-developed character, illustrating the complexity of possessing great intellect alongside personal insecurities.

Characters like Mr. Curtain and Mr. Benedict have their own traits, but they do not embody the same blend of brightness and nervousness that defines Sticky's character. Reynie, while intelligent, shows a more composed demeanor compared to Sticky's nervous disposition. Thus, Sticky stands out as the character who fits the description accurately.