The seven knights of the Kingsguard were stationed in different locations during the last days of King Aerys II. Gerold Hightower, Oswell Whent, and Arthur Dayne were stationed at the Tower of Joy, and later on killed there. Jaime Lannister was in King's Landing with Aerys. Barristan Selmy was at the battle on the Trident. I believe that Jon Darry was also on the Trident. I assume that Darry was killed during the battle, as I can only remember that Selmy surrendered. Is that correct?
Who was the last member of the Kingsguard, where was he at that time, and what happened to him? Was he with the king's wife on Dragonstone? As far as I know, beside slaying Aerys, Jaime only killed the pyromancer Rossart and not one of his Kingsguard brothers.
The reason I'm asking is that I am confused whether the King was only protected by one member of the Kingsguard.