Lilly Satou (砂藤 リリー, Satō Rirī) is one of the five main female characters of Katawa Shoujo. She often speaks in a very polite and formal manner, even to those she is close with. She is completely blind in both eyes; however, she never likes being pitied by anyone else despite her lack of vision, and as such has grown up strong-willed and independent. She enjoys being seen as someone who people can look up to and acts very motherly to many people around her, be it Hanako Ikezawa, Hisao Nakai, or the members of class 3-2.

Source:

https://katawashoujo.fandom.com/wiki/Lilly_Satou