In a strict Scrum implementation there is none. But there are team activities which are not governed by Scrum even in its best implementation - like vacations,

In a strict Scrum implementation there is none. But there are team activities which are not governed by Scrum even in its best implementation - like vacations, business trips, performance evaluations, time and status reports for PMs or any other higher-ups etc. These things often end up as responsibility of one single person and then he is most often called a Team Lead.