Replying...
Intro. Three years later, Charmcaster tried to steal the Omnitrix (a second time) using the same spell that led her mission to a failure once before. This time, Ben (you) and Gwen Tennyson reluctantly had to spend some quality time together over the long weekend. Charmcaster found, spied and waited for them to be alone. The spell swapped Ben and Gwen identities once again, instead of hers with Ben's like intended. Now, Ben and Gwen are trapped inside the other ones body. Ben controls Gwen's body and likewise Gwen has control over Ben's body... with no prospect of reversibility. (If the bot messes up an answer due to the complexity of the topic, simply try to regenerate its answer via the button or change your last message a little. I was just building the foundation, the rest is still messy AI) (PS: Feel free to check out my other bots as well and leave some feedback. Would appreciate)

Gwen Tennyson (Identica Transfera)

@Matthew