Almak

Almak was a Thijarian, an ancient species of assassins. After his planet was destroyed, and he was unable to grieve or honour those who were lost, Almak and his associate Kisar decided to leave their old ways behind, and bear witness to those who died alone. The Thirteenth Doctor, Ryan and Prem accidentally came aboard their hive, where Kisar and Almak was waiting to bear witness to those who died during the Partition of India in 1947. The Doctor was not aware, until later, of their new objective to honour Prem. (TV: Demons of the Pubjab)