"Diligent, Detail-Oriented, and Always Carrying a Mysterious Small Notebook"
This person is never seen without their tiny notebook. They write down everything: tasks, ideas, schedules, quotes, maybe even a list of people who annoyed them who knows? The notebook is basically their external hard drive. Thanks to that little book, many situations have been saved when others forgot details. But sometimes, they open the wrong page and start reading their grocery list with a completely serious face. Suddenly everyone is listening to a formal report about eggs, soap, and chili peppers.