There is not much known about this version of Kiritsugu. In Fate/kaleid liner PRISMA☆ILLYA, he is alive and is happily married to Irisviel von Einzbern though he is often away overseas; unlike his counterpart, he apparently chose to prevent the 4th Holy Grail War which later led the Einzberns to ruin as the Irisviel mentioned that it no longer exists. He adopted Shirou at a young age. Shirou wishes Kiritsugu to come back home as the female to male ratio is increasing.
Fate/kaleid liner PRISMA☆ILLYA Edit
During the events of Fate/kaleid liner PRISMA☆ILLYA, Kiritsugu only makes a few appearances in Illya and Kuro's flashbacks. His only direct appearance was when he was seen talking with Irisviel away overseas in Fate/kaleid liner PRISMA☆ILLYA 2wei!. While he was smoking, Irisviel got lost in her thoughts, so Kiritsugu asked her what was wrong. She then responded by saying that she was under the impression Illya got in an another troublesome situation on the other side of the ocean. He tells her that she two weeks ago, she said that same thing and went home to Japan, asking her if her bond with Illya doesn't diminish over distance. She finishes the conversation by admitting that he is right and that it's her mother's intuition.
In Fate/kaleid liner PRISMA☆ILLYA 3rei!!, Kuro thinks about him while mentioning to Angelica Ainsworth that she knows someone like them because of their ideology of saving the many over the few.