Romana I

Romana I is the name given to the first incarnation of the Time Lady Romana.

Assignment to the Doctor
The White Guardian originally assigned Romana to assist the Doctor during the quest for the Key to Time.

Romana was on first appearance a naive young Gallifreyan who considered the Doctor an academic inferior.

However as searched for the various pieces of the Key to Time she came to respect the Doctor for his greater experience and knowledge versus her stolid academic credentials.

At the end of the Key to Time assignment, Romana, for reasons that remain unclear (see the main Romana article for details) regenerated into Romana II.

The first Romana's form would later be used as the body for the Pandora entity, allowing it to take control of part of Gallifrey and begin a civil war. (BFG: Imperiatrix)

Personality
Though a young (about 120) and relatively inexperienced Time Lady, she was nevertheless extremely bright and capable, having obtained a triple first at the Academy. (The Doctor scraped through with a minimal passing score on his second attempt.)

Romana is an exceptionally clever (even on-par with the Doctor), slightly bossy person. She possesses many personality points of the Doctor. In her first incarnation, she was more haughty and "by the book" and was occasionally annoyed by the Doctor's eccentricities.