I personally think that Rambley wouldn't hurt Lloyd, maybe he would, I dunno, but I think that the mascots were animals who were turned into the mascots, and to keep them in line, the employees had to "teach them their place" by hurting them to get them to do what they want, which then led to disaster and the park being shut down.
Now, as for the rambley part, I think the employees would probably be wearing the ears or maybe a mask or something that looked like rambley.
"But what about that coming from an animatronic? Why'd she say that?" Well, I have no clue, but I do think that since she's broken down, she may be spilling some confidential stuff in her drive which was never meant to be revealed. It could be stuff she saw and when the employees noticed, they hid it and locked that footage away.
Also, HOW would Rambley hurt them? All he has access to is the electronic stuff. He doesn't have a physical body.
Then again, that high-pitched ringing hurt Lloyd's ears, so maybe Rambley used that to hurt him.
So, in conclusion, I think that there are 3 possibilities. Either the employees were mistaken for Rambley, Rambley did hurt Lloyd with the ringing noise, or Rambley is just evil and did somehow hurt Lloyd, though a lot of people speculate that Rambley is secretly evil, and if they want a good indie horror game with good lore, they wouldn't make it that easy to figure out, so I don't think Rambley actually hurt Lloyd.
