Cosima Niehaus

Cosima Niehaus is a Ph.D. student and a clone of American origin on Orphan Black. Her "tag number" is 324B21.

She, along with fellow clone Alison Hendrix first meet Sarah Manning whilst the latter is under the guise of Beth Childs. The three clones decide to group together to form "Clone Club"[2], whose aim is to find their origin and where they come from. Cosima is involved in a romantic relationship with Delphine Cormier until they break up due to Cosima believing she could not trust her anymore, but they later get back together. Cosima is currently suffering from an unknown respiratory illness originating from her ovaries and reproductive system which causes her to cough up blood.

Cosima usually wears her hair in intricate dreadlocks. In addition to her tattoo, Cosima also has a nose ring. According to Felix, Cosima has bigger breasts than Sarah and is apparently more attractive.

Cosima is an eccentric, queer, tattooed geek girl with a scientific mind verging on genius. She's dependable, incredibly caring, brave, driven to find answers and, like Sarah, adaptable to extreme circumstances. She also tends to diverge on scientific topics and can talk relatively fast when she gets excited.

Cosima's sense of modesty is a little odd. After making love with Delphine the first time, she leaves in just her underwear and coat to run an errand.