Official Art of Kozuki for the 1 year anniversary. Source
小搗き: pounding (mochi) 湖月: Lake Moon
Kozuki / Koduki (こづき) is the protagonist and one of two playable characters of Tsukumono Yume (つくものゆめ). She seems to be trapped inside a small tatami room that with a sliding door that was blocked.
Kozuki has shoulder-length dark gray and black hair tied back in a ponytail. She wears a traditional black Japanese Kimono and sandals.
Unknown. It is mainly left to the player's interpretation what her personality is.
Very little is known about Kozuki's past. She appears to be connected to the second protagonist, Amatsuki (雨付き), in some way, given some of the effect locations (Disheveled Hair and Bush Warbler) as well as events (Monochrome).
The Monochrome event may imply that Amatsuki tried to protect her from something terrible.