The name Tiara is mentioned only 3 times in the videos. The first mention is in the note in Care’s room:
Tiara says young people can be psychologically damaged ‘beyond rebirthing’The second time is in the question asked to Tool in Petscop 5:
“Who is Tiara?”
Answer: Petscop kid very smartAnd the other question in the same video (the full question "Do you remember being born?" didn't fit)
“Remember being born?”
Answer: I'm not Tiara
Tiara seems to be associated with the color purple (#56204c)
There may be a connection between Tiara and the Creepy Quitter’s Room Girl, because of the note on the wall in the Quitter’s Room “do you remember being born?”. The fact that Tool redirects the question to Tiara indicates that she has a connection to this question. To “remember being born” is probably impossible, unless you are talking about “rebirth” and “rebirth therapy”. If Tiara remembers being born, this could mean she has gone through rebirth therapy.
Candace Newmaker’s birth name was Candace Tiara Elmore. Tiara might be a reference to her, or it might mean the actual Candace Newmaker is somehow a part of the game. Candace Newmaker was also called a quitter repeatedly before her death. This further connects Candace to the Quitter, and also to Tiara.
Tool’s answer “Petscop kid very smart” can be interpreted two different ways. Tool could be referring to the player, calling him a “Petscop kid” and saying he’s smart for asking the right questions. Alternatively, Tool could be referring to Tiara, calling her a very smart Petscop kid. The meaning of “Petscop kid” is unknown. It could mean anyone that plays the game, or it could have a deeper meaning, depending on what “Petscop” actually means.