The process of one person absorbing or merging with another. I broaden this a bit further and also count works, that basically take two (or more) people and let them appear as one. Be that by absorbing the other person to just change a certain body part of someone, or completely merging the people into one being, with a shared / or also merged consciousness. This, of course, is a sub category of Transformation.
Works by StarGizar
A few of my favourite works by StarGizar on DeviantArt. Works by StarGizar Monthly Vote Comission: April DeviantArt After so many different transformations, Maya has learnt that her body has developed the ability to fuse with others. And a tired and exhausted Gale, who could do a few days rest from doing paperwork. Is the perfect person for Maya to try out this new skill… ...