Yarvell

Yarvell was a Kaled female, the daughter of Colonel Nasgard and Lady Calcula and the elder half-sister of Davros.

Profile
She loved her father but resented her mother for constantly favouring Davros over her, and was disgusted by her brother's interest in animal life. At age 18, she was a member of the Military Youth. but was frustrated at how long it was taking for her to become an officer. She befriended Major Brogan when he brought Nasgard home, and when he comforted her when she grieved her father's death, he revealed his pacifist ("peace activist") beliefs to her. She was devastated when she was forced to help execute Brogan, believing him to be innocent, and was horrified at Davros' request to have Brogan's body for experimentation. (BFD: Innocence)

By age 31, Yarvell had become an officer of the Kaled military, and a member of the peace movement. When she learned of Davros's part in a mission to destroy a Thal weapon development facility, she told some of her contacts in the peace movement, who warned the Thals of the attack. She didn't want her brother dead, just removed from the war effort as she saw him as a threat to peace. After Calcula tricked Yarvell into revealing the truth, she drowned her in the swimming pool at their home. Davros acquired her body for his experiments. (BFD: Purity)

After Davros was rescued from the Thals by Nyder, he hallucinated conversing with his mother and sister. (BFD: Guilt)

Behind the scenes
Yarvell was named after Yarvelling, the humanoid Dalek scientist from The Dalek Chronicles.