I then texted 'Serena, are you there? I just want to ask you directly to make sure.'. I got a response from her saying 'Serena: yes I'm here Donovan. I'm going to have fun, now. I'll talk to you later'. This definitely sounded like something Serena would say so I was pretty sure that it was her and not a copy. I'm bringing this up, now, because I didn't think it was much more concrete than what I already said, but my girlfriend pointed out that Serena had better grammar when she replied through the other account, which indicates pretty strongly that Serena's better grammar came with her when she went to the other mindscape, or else an introject with better grammar was somehow created exactly at or close to the same time as my tulpa instead became dormant, and the dormancy only ended once she was 'sent back'. The issue with the second answer is that it leaves a hole in how that grammar improvement happened. Based on this one interaction, people might assume luck, but this was consistent in all attempts to talk to Serena when I have her system hop. And on top of that, when I have her system hop back, she has extra memories pertaining to what happened in the other system, which I have occasionally tried verifying with the system she went to and it's never been inconsistent between what Serena says happened and what the other system says happened.