Cosima is a character from the television series Orphan Black, which explores themes of cloning and identity. She is portrayed by actress Tatiana Maslany and is one of the many clones created from the DNA of a single woman. Cosima is known for her intelligence and passion for science, particularly in the field of genetics. In the series, Cosima works to uncover the mysteries surrounding her existence and the implications of cloning. She faces various challenges, including health issues related to her genetic makeup, and develops strong relationships with other clones, such as Alison and Sarah. Her journey highlights the ethical dilemmas of cloning and the quest for self-discovery.