Donna Noble

Donna Noble is a companion of the Tenth Doctor in Doctor Who, portrayed by Catherine Tate. She is known for her fiery personality, humor, and straightforward attitude. Donna first appears in the 2006 Christmas special, "The Runaway Bride," where she is initially skeptical and overwhelmed by the Doctor’s world.

Unlike some other companions, Donna isn’t afraid to challenge the Doctor and call him out when needed. She grows significantly throughout her travels, transitioning from a temp worker with low self-esteem to someone who discovers her inner strength and compassion. Her adventures reveal her bravery, loyalty, and deep empathy, making her one of the Doctor’s most beloved companions.

A key element of her character arc is the development of the "Doctor-Donna," where she temporarily absorbs the Doctor’s Time Lord knowledge and abilities. Tragically, this knowledge threatens her life, and the Doctor has to erase her memories of their time together to save her, returning her to her ordinary life without any recollection of her travels.