Mbude said several concerned parents had called her office.
It is believed Nako possessed gifts of traditional healing, including conducting readings, and experienced moments when ancestral spirits would "take over her body".
On Tuesday, things were quiet at the school, with a few police vehicles parked outside but no pupils or protesters in sight. There were no disruptions to the matric isiXhosa exam.
On Monday, hundreds of people, including traditional healers, pupils and parents, gathered outside the school calling for justice for Nako. They included representatives of political parties.
Their demands included the axing of the teachers involved, the expulsion of the implicated pupils and the axing of the school principal. They also wanted the school governing body to be dissolved.
SA Democratic Teachers' Union secretary Chris Mdingi said they had advised the department to organise an alternative venue for pupils to write their final exams in case of interruptions.
Nako will be buried on Sunday.