a server who carries the processional cross and leads processions
The one who carries the cross.
The Crucifer is the Acolyte who carries the Processional Cross.
The processional cross, or the person carrying the cross
a person who carries a cross, as in ecclesiastical processions. Source
The person who carries a cross in procession. Comes from two Latin words which literally mean "to carry a cross."
A crucifer is, in some Christian churches (particularly the Roman Catholic Church and the Anglican Communion), a person appointed to carry the church's processional cross, a cross or crucifix with a long staff, during processions at the beginning and end of the service. The term "crucifer" comes from the Latin crux (cross) and ferre (to bear, carry). It thus literally means "cross-bearer".