Scientist Shan was a member of the Kaled Scientific Elite towards the end of the Thousand Year War between the Kaleds and the Thals on Skaro. She worked under Coordinator Davros. She wrote a paper suggesting the Kaled race would need to be re-engineered to survive a post-war Skaro, which she called "The Dalek Solution." (BFA: Davros)
Shan supported Davros's experiments at first, but came to be horrified and objected to them. Davros had her arrested and executed as a traitor. The same happened to Councillor Valron. (BFA: Davros, BFD: Corruption)
She was the daughter of Colonel Krakor, a senior member of the Military Elite who was reported as being killed in battle on the same day that Shan was executed. (BFD: Corruption)
Shan was an altruistic soul who was dedicated to helping others. She despises war as shown through her disgust at the slaughter of some Thals and her attempts to convince Davros that they should make peace. (BFD: Corruption)
Shan has a sense of humour that was shown at her reaction to Calcula's hysterics over some rodents that Davros had collected. (BFD: Corruption)
Shan was also capable of great courage as was shown when she stood up to Davros when he shouted at her for her relationship with Valoran.... not even intimidated by his anger. (BFA: Davros, BFD: Corruption)
Shan was so intelligent that she would've been the head of the Scientific Elite instead of Davros if it weren't for Davros's betrayl.