Amita Ramanujan

Dr. Amita Ramanujan, Ph.D, (Navi Rawat) is a main character in Numb3rs. She begins the series as Charlie's student where he is her thesis advisor and frequent collaborator. Then she becomes his his girlfriend, later she becomes his fiancee, before she finally becomes his wife in the series finale.

Backstory
Amita Ramanujan was born on June 10th, 1975 at Cedars Sinai Hospital in Los Angeles at 06:31 AM. Her birth certificate was not witnessed and dated until June 12th, 1975 when a name other than Jane Doe Ramanujan was entered into the public record. (Season 5's First Law)

She is the daughter of Tapti Ramanujan (Gita Reddy) and Sanjay Ramanujan (Brian George), Indian-American citizens who work for the Indian Ministry of Finance. At some point pre-series they moved back to India. They are finally able to visit Amita and Charlie in Pay to Play after several months of scheduling conflicts and delays.

Amita grew up in America and does not speak her parents native language very well.

Amita finishes her math studies (almost incidentally acquiring a Ph.D. in the process) and transfers to the Physics Department, in large part so that she and Charlie are no longer teacher and student, and thus not precluded by CalSci's bylaws from having a relationship. As so often with these things, however, they are a living demonstration of Shakespeare's assertion that "the course of true love never did run smooth", and numerous roadblocks and precipitous drops bedevil their route to "happily ever after". She got her phd at the end of season 1.

Personality
Amita is a phenomenally intelligent, generally extrovert person with a similar voracious curiosity to that of Charlie and Larry. She is, in general, the voice of sanity and the real-world in their planned explorations of the outer reaches of thought.

She has played an online alternate reality game called Primacy since she was an undergraduate. It's a temporary game which is part of an MMORPG, which goes on for years. Amita is part of an alliance who plays a few hours a week. Her avatar is Kali, the Goddess of Destruction. She chose the name/avatar when she was 19.

Numb3rs Season 4
In Primacy Amita agrees to move in with Charlie.

Numbers Season 6
According to Amita in Arm in Arms, she has a cousin who had to postpone her wedding for four months because they couldn't schedule the elephant the groom traditionally rides in on in India.

In the same episode they attempt to solve the issue of when to get married by using math. Charlie's equiation lands on August 21st 2010, which turns out to be the date of Amita's grandmother's hip surgery. Amita's combinatorics land on July 17th, which is Amita's cousin Venei's graduation. In the end, they land on October 9th after Alan suggests his and Margaret's wedding date.