Shirou-Style Spirit Transformation Technique

By removing his soul from his body, Shirou, is able to go from body to body. Using the techniques mechanics, Shirou can not only use his opponents body, but he is able to keep the stolen target's voice and features, person, and etc. When Shirou uses this technique, not only does he gain access to the target's abilities, he is still able to pertain his own techniques and abilities, including kekkei genkai. This technique grants Shirou his immortality, which explains how he's still around.