He seems to be the angel who protects the family. Then, in the ending chapters, he reveals a truth about his angelic nature. Angels do not marry. They are pure spirit beings and are referred to as a 'company' rather than a 'race'. They are always referred to in the masculine gender.
Angels have different functions.
The angels celebrate before the Throne of God every time a sinner repents and turns to God. Angels escort Christians to heaven when they die. Messengers of God. However, appearances of the angels are usually brief and formal. We will judge the Angels.