Aphril

Aphril is a female Human Conjurer and one of the inmates of Spellhold.

Baldur's Gate II
Aphril can be found on the top floor of the Spellhold Assylum on Brynnlaw in Chapter 4 where she is being held captive in one of the cells. Her ability to see through the planes drove her mad and she will tell the player about the things she sees and even show them.

Like all of the inmates, she later dies during the fight against Irenicus in the basement.

Cross-references to other games:
Most notably she sees things from two other games, namely Planescape: Torment and Neverwinter Nights. ​
 * "I see... a city of changing streets under the Lady of Pain. My eyes... pluck out my eyes."
 * "I see... a walking corpse... he speaks... to a pillar of skulls? See, it is madness!"
 * "I see... a place... coming soon... where there is... never winter... where people have control... over their own stories. Yes, it's a shameless plug from Aphril Foreshadow."
 * ​The latter one is also seems to be a throwback to Lord Foreshadow from the first Baldur's Gate.