Leone Abbacchio possesses a complex personality characterized by a mix of stoicism, introspection, and a deep-seated cynicism. He often appears reserved and aloof, with a tendency to keep others at arm's length. Abbacchio is haunted by his past as a police officer, which contributes to his pessimistic outlook on life. Despite his tough exterior, he harbors a strong sense of loyalty to his comrades, particularly to Bruno Bucciarati, whom he reveres as a leader.