But... it makes sense o.o; You asked about what Ken sees, and I said I could not tell it... Because all of them see the same thing, except Daisuke. And, there's a reason to him be the only one to see something different.
If Ken's vision was like, Osamu -- as sample -- then, something could be wrong. An illusion, fake. And the answer of what is that thing I can't reveal because the new riddle .w.
Well, I'm not God, I can do mistakes and fix them... *sighs*
Most people guessed it was a person (present-Daisuke, Taichi, Adv!Taichi, VT!Taichi, Taiki, other goggle leader, Daisuke's son, etc). I intentionally added Ken in this plot (I was planning to use another Chosen Child, but I think changing to Ken (thanks Komi for sending that question xDD) was better, because he will be a detective in the future.
I forgot adding Ken there (my fault), maybe this was my mistake. If I had added him as I should do, probably it would make it more easy. Ken saw it too, he and Wormmon, so the questions would be "which one is real??", and not a hard task.
My apologizes for my stupid mistakes. Well, we can fix it, right?? You can send me a note, and I will give you something like this (the second one) as my way to apologize for this mess.