Like her sister Burn, Blister appeared to have no mercy on anyone she considered an enemy, or even those who knew too much, as displayed when she killed the SkyWing guardian, Kestrel. Unlike her sister Burn, she regarded killing as a necessary task to gain the throne, rather than a pleasurable pastime. She was described as the smartest and most cunning of the three SandWing sisters, and proved to be very intelligent throughout the series. She was one of the smartest dragons in Pyrrhia. Blister was a master trickster, having at one point convinced each one of her soldiers that he or she was an elite spy on Blister's orders. She also seemed to think very highly of herself as she addressed Coral informally as "Coral" as though she were an equal.