Now that I think about it, it really was a vocal stutter at first. Funny how she just uses it normally nowI think the ''chan san'' is supposed to represent stutter, since you don't use both together. I think she first used it in chapter 4 as a real stutter View attachment 8310, and it eventually became her vocal tic by chapter 7.
it reminds me of gsnk of everyone calling hori, "Hori-chan-senpai"Now that I think about it, it really was a vocal stutter at first. Funny how she just uses it normally now