If there is only one teacher teaching an instrument, then it is likely a panel of 1 lol. Yes, teachers will have students in mind, and they can make up their mind before auditions even happen that they want to admit some student, it is one of the reasons knowing a teacher before auditioning can be so helpful. It is very different on violin where even if a teacher wants to teach you, you would have to go through a panel (the assumption would be, of course, that if the teacher wanted to teach you, then the student would be up to snuff to passing the audition). Some schools I have heard will have multiple music teachers audition a kid even if they only have one teacher on the instrument, though I haven’t heard names of specific schools that do that, so can’t verify that.