Gramotei...
From there came a sound like a typewriter in the mentor's house. We need to check if anyone is there.
a) your own actions
b) your past and any actions of any characters, if they were in the past (and if such a description does not contradict some elementary facts about the world of Nero)
I describe the actions of the characters in the present and their appearance, if the character is important and if his appearance has not been described in advance by you. I also describe the result of your actions if it is not unambiguous (in most cases, it is). OK?
In this case, you could have written that you were looking for a certain house on the outskirts, you could have described that your mentor had a typewriter (although such things are better in the bio), but it is undesirable to write about the sounds of a typewriter.
In the window of the house, some humanoid was visible, but his face could not be seen due to the soot.