It would be near impossible to take a sample from Ryoko. The one time someone managed a clone of my daughter, they had to capture her first and even then it was a rather imperfect clone. At least~ it appeared that way to me.

[Though,she had to give Clay credit, Zero was a rather nice piece of work.]

To create a clone, one would need a sample from the original. Though with the right technology, they might have been able to use our memories. If that is the case, then I would really love to sit down with one of these so called 'scientists' and have a little chat.