Masked Man

All of the teachers in Echelon Academy were mixed-bloods so they would have been able to assist and save the workers faster than Gustav could but only about three of them were present right now. 

The staffs' room ass also happened to be far from the kitchen area so unless they were outside the building, they wouldn't be able to see the flame.

School activities normally start by eight am so no student could be found within the vicinity.

After calling the fire department, boss Danzo was told that they would arrive in five to ten minutes but he knew that ten minutes was long enough for a person to be turned into ashes so he hurried towards the staff block to inform any available teacher.

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Immediately after Gustav got back in, he looked around. All that could be seen were flames and burning debris positioned in different parts of the burning Kitchen.

Most of these burning debris and fallen parts of the ceiling blocked Gustav's path.