[[Surimuki]] (lit. Scraped Girl) is an obscure character only known through finding a [[book]] in the [[Library]]. 

Enter the library, go left to the last book in the first [[bookshelf|bookcase]]. You will be greeted by lined [[paper]]. Press enter and words will appear, she will pop up and [[laughing|giggle]]/[[crying|sob]]. This note she has written says "すりむいちゃった。" meaning, "I got [[injury|scraped]]."

"2kki Wiki":[https://yume2kki.fandom.com/wiki/Surimuki]
surimuki