|Born||In 188–190 AC, Standfast|
|Died||In 209 AC or 210 AC, King's Landing|
|Book||The Sworn Sword (mentioned)|
After the defeat of Daemon I Blackfyre on the Redgrass Field, all of his supporters who survived the war and remained in Westeros were made to pay for their treasons. As Alysanne's brothers were all dead, she became a hostage at King's Landing at the age of seven to ensure the good behavior of her rebel father, Ser Eustace Osgrey. At some point she became a silent sister and died in the capital at the age of twenty of the Great Spring Sickness.