In Kamen Rider Revive's latest words, we also see the resurrection of the demon Vail, whose holster is simply a repaint of the demon Vice, that is, this time he did not wear a mask. However, for its host, it is still in an unknown state.
The first thing to exclude should be Yuantai, because from the latest Vail biography, it is known that the demon Vail who attacked Yuantai and his parents was the demon Vail, causing the tragedy of Yuantai. From this, it can also be inferred that Vail should have existed at the Noah Institute for a long time, and found mice suitable for transplant experiments for humans by constantly attacking humans.
Excluding Empress Yuan, the most likely host candidates for her are only the following:
First of all, there is Chief Akashi, which we said a long time ago that demons can only be seen by the host before they are physicalized, and Akashi's ability to chat with him also shows this.
The second is the demon Kif, who is inferred to be a demon that is directly differentiated from Kiev, so it has the powerful power to crush its Kamen Rider, and as Kif gradually becomes stronger, the demon Vail also gradually manifests until the final materialization.