What is cool about Tails Doll? Why is the doll scary? Was this made up because the doll was seen from the 1999 game "Sonic Adventure" and it was frighten?

I'm asking this because I'm curious. Plus I don't seen nothing scary about Tails Doll. Not even ক্রিপিপাস্তা অথবা other horror চলচ্চিত্র depend on what it is.