[Den-O]

If you didn't see the front page article, I think we can infer some things about the Imagin. It's name is confirmed as Futaros, following along the naming convention of the Den-Liner crew. Fu roughly translating to minus/negative, Futaros is the opposite of Momotaros, and a therefore perfect companion for Another Den-O. My guess would be that a Time Jacker gives Futaros the Another Den-O Watch, and then has him form a contract with a human to use it. Another Den-O may be a bit more of a special case in that regard.

Another W is insanely gorgeous. The way that it looks like this creature was born from the split down the middle of W's body is just chilling. You can see the regular compound eyes of W's two normal halves on either side of his face. Super eerie and cool.