You will have a clinical instructor with you who is a faculty member of your school, and who is responsible for you when you're in clinical. You will also be interacting and working a lot with the staff nurses of the hospital (or whatever) who are assigned to the same patient(s) you are. All of the patients you work with will also have a staff nurse from the facility assigned to them, the same as if you weren't there (you are considered entirely "extra.") Some of those nurses will be v. friendly and interested in enhancing your learning experience, and some won't!
Your school has no control over that, and there really isn't anything that can be done about it (except for the instructor, when s/he is making assignments, to try to avoid certain nurses on a floor, if they are hostile toward students.) Some of the nurses may feel that having students on the floor for the day means that they can sit at the nurses' station all day and look at magazines while the students do all the work (not many!
But I've seen that be the case when I was nursing faculty.)
The number of nursing students allowed per instructor in clinical is set by your BON and the organizations that accredit nursing schools
. Best wishes for your studies --