Odo is a fictional character from the television series Star Trek: Deep Space Nine. He is a shape-shifting alien known as a Changeling, who serves as the station's chief of security. Odo has a strong sense of justice and often struggles with his identity and origins, as he was found as a liquid substance and raised by Bajoran scientists. Throughout the series, Odo develops close relationships with other characters, including Kira Nerys and Quark. His unique abilities allow him to transform into various forms, which he uses to maintain order on the space station. Odo's character explores themes of belonging and morality.