Faces
Make a synthetic person and keep the same face across every photo. Nobody real is involved: the face is generated from random noise.
Making a face — ten synthetic candidates to choose from, and the same face applied across a whole batch — runs in the IMAGO desktop app on your own computer. This page mirrors that screen so the site matches the app.
It needs the Identity add-on, which you install from the Store. A saved face backs up to a .faceid file you keep.