The interviewer will use this question to gauge your self-awareness. By understanding the type of manager or employer that brings out the best in you, they'll be able to evaluate whether they can meet your expectations. Research the company as much as possible to learn their leadership culture. There's a lot of information on their Life at Deloitte Blog and leadership development programs. If what they offer is unclear after your research, try to leave your answer as open as possible.
The more friendly and forthright you are, the more you open up and let them know you, and the more successful you'll be in your answer. Whether you had a strong mentor in your career or a professor in college who inspired you, describe the qualities you admired and embrace within yourself. By providing relatable examples of leaders you respect and who influenced your character, they'll gain a glimpse into your personality, philosophy, and approach to your leadership style and work ethic.