stoled from http://astrange.ithinksw.net/sa/shii/faq

　　　　　∧ ∧＿__　　Hay guys!
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Shii (しぃ) is female and cute. At some point she was abandoned and now she lives in a cardboard box. She is Giko's girlfriend. It's unclear whether her name is supposed to mean "C", "ayashii" (strange), or "she". Other characters (especially Moraler) like to hate on Shii a lot.

http://maruheso.at.infoseek.co.jp/aadic/sa.html#sixi