Sorin (At Childhood's End)

Sorin was a black cat owned by Ace in the year 2020, when she worked as CEO of A Charitable Earth following her time travelling with the Seventh Doctor. He lived with Ace in her London penthouse. Sorin was a good-natured cat who rarely hissed and would come running to demand food and attention whenever Ace's friend and colleague Sanaul came around. Ace was protective of her cat, like all those she loved. Consequently, she was angry when a Ratt attacked and threatened him. (PROSE: At Childhood's End)

Behind the scenes
Sorin shares a name with Captain Sorin, a Soviet soldier who Ace met and grew close to while traveling with the Doctor in the Doctor Who season 26 serial The Curse of Fenric.