The Catholic Union at Holy Family Convent aims to uplift the spirituality of students and instill good values, molding them into faithful Christians and responsible human beings. Guided by the teachings of the Catholic faith, the union operates under the leadership of dedicated teachers, including Ms. Nilanthi Perera, and Ms. Joyce. The union emphasizes the importance of walking in the footsteps of Jesus to build the kingdom of God in the present world, fostering a strong sense of community and faith among its members. The motto, "For Nothing will be Impossible with God" (Luke 1:37), reflects the union's commitment to spiritual growth and service.