Oh, I thought we were going to talk about our tulpas taking exams for us. Well, my tulpa Tewi's studied and taken tests for me plenty of times, she's better at it than me.
While we do switching and not possession, early on they did get tired after fronting for a varying amount of time. When we very first started, like the first week or two, they would get tired after 2 to 4 hours and have to switch back with me. The next month or two maybe, they could front the majority of the day and would end up fairly tired by the end, while we don't normally get tired unless we've been up a lot longer than 16 hours. But after that, not really no, they can front for as long as they want now. Lucilyn's fronted for like two months straight before.
But yeah, when doing a new thing that takes a lot of effort mentally, it's not too strange to be tired afterward. But I will say, in my experience at least, you guys'll get used to it and it'll become a lot less taxing with time. Again, after a point my tulpas could front 24 hours and then the next day would be no different from the first, etc. That's also the point where they started waking up still fronting instead of it defaulting back to me.