Parent traveling with children on the train to Asturias.
Marcos belongs to the adult group responsible for the children during the journey.
Marcos is described as a parent traveling with the children, and Unai is identified as a child traveling to camp.
They are connected through the family travel situation and its escalating confusion.
Marcos and Nacho are both associated with the traveling group and the children's disrupted train journey.
They belong to the adult side of the group trying to manage the trip.
Both Marcos and Diana are described as parents traveling with the children to Asturias.