I've dreamt about former T twice -- most recently last night.
Current T hasn't ever shown up in my dreams.
Both dreams of former T were scary -- the one I had yesterday involved her chasing me because she was angry that (in the dream) I found out where she lived and passed outside her house on the way to somewhere else as a shortcut. In the dream, I hope to avoid her as I pass outside her house but she comes back to her house, sees me, is polite and friendly and then just when I make my escape, I can feel her wrathfully chasing me -- I woke up just as I was fleeing for dear life.
The first dream I had of her was so scary that I couldn't go back to sleep despite waking up at 3am or something. I had this dream about a month after starting with her.
I didn't tell former T about the dream but did tell current T who seemed super uncomfortable (have no idea why) and had no insights to offer.