Krizt can only be interacted with if approaching Moonrise Towers for the first time. She probes the party through the use of her own Mind Flayer Parasite Specimen. Upon recognizing the party lead as a True Soul, Krizt asks for news from the field; the party can respond with a variety of dialogue options, but upon asking Krizt why she is on guard duty, she reveals that it is to recognise fellow True Souls.[1]
Once entering Moonrise Towers, she returns to the towers and disappears. The party can later find her corpse in the Oubliette at X: 625 Y: -89, where she can be looted.[2]
↑ The dialogue options with Krizt are nearly identical to the ones of Zealot Malik, except for a few shallow differences in wording.
↑ It's implied by Zira and Soreni's dialogue together that Krizt has most likely undergone an audience with the Absolute, and was then soon disposed of.