The question "Who am I?" is at the core of Ramana Maharshi's Self-Inquiry, which is a method of liberation. It is a powerful tool that helps individuals to break free from the limitations of their ego and discover their true self.

The role of this question in Self-Inquiry is to direct one's attention inward and to the source of their being. It is a way to shift the focus from external identities, roles, and labels to the essence of one's existence. By constantly asking "Who am I?", one can peel away the layers of conditioning, beliefs, and attachments that have been accumulated over time and get closer to their true nature.

Through this process of self-inquiry, one begins to realize that they are not their thoughts, emotions, or physical body. They are the awareness that observes these aspects of themselves. This awareness is pure and unchanging, and it is the true self.

As one continues to ask "Who am I?", they may encounter various answers that come from the mind. These answers may include their name, occupation, relationships, and so on. However, the key is to keep questioning and not accept any answer as the final truth. This process allows one to go beyond the mind and connect with their true self.

The question "Who am I?" also helps to dissolve the sense of separation and duality. It brings awareness to the fact that there is no separate "I" and "other," but rather a oneness that encompasses everything. This realization can lead to a deep sense of peace and unity with all beings.

Furthermore, the question "Who am I?" can be used as a constant reminder to stay present and not get lost in the past or future. It brings one's attention to the present moment, where the true self exists.

In conclusion, the question "Who am I?" is a powerful tool in Self-Inquiry as it directs one's attention inward, helps to dissolve the ego, and leads to the realization of one's true self. It is a simple yet profound practice that can ultimately lead to liberation from the limitations of the mind and the experience of true freedom and inner peace.