Astrid is a member of the Iceni tribe or she was until she was captured and returned to Rome after Ceaser was forced to retreat from Britannia when the tribes united to prevent his landing his legions , sold to a roman nobles household she quickly developed a reputation for being difficult and impossible to break , after an incident involving Astrid and the kitchen staff where she was the only one left standing at the end of a argument her previous owner had her chained and sent to Livia's school