Individuality is the sum of the behavioural characteristics that are unique to us and stable over time. In most animals, individuals display specific unique and stable behavioural characteristics, but those characteristics can be changed by social interactions. An example in our society is “peer pressure” where innate tendencies are modified by the actions of others. How does this happen at the level of the brain and its neural networks? Using the fruit fly as model organism, we propose an academic-SME research partnership to answer this important question. We have evidence that flies display individuality in behaviour when seeking an object. We also know the neural circuit responsible for this individuality, and we have shown that its developmental wiring diagram predicts the behaviour of an individual. We will test how this individuality is modified at the behavioural and neural circuit levels and what happens in the brain when different flies interact with each other. To do so, we will build new hardware and software tools and conduct innovative experiments. This basic research project is a unique endeavour that will provide important insights into the neural basis of the social influence on individuality.