Who are the previous Tal hosts? How old is Tal?
After exiting the memory pool, Adira names them as follows:
Kasha Tal, Jovar Tal, Madela Tal, Cara Tal, Senna Tal, and Gray Tal, in that order.
We know that this is Gray, blue-haired trans king of our hearts:
And we know that this is Senna Tal, the mysterious Admiral who led Discovery to Earth in the first place. His memories are probably going to play an important role this season.
I’m going to go out on a limb and say that Tal A. is Kasha because his uniform is exactly what is worn in Picard:
Picard takes place in the 2390s. If Kasha Tal was an officer in this era, it would make the Tal Symbiont around 800 years old, which doesn’t seem quite right to me. We aren’t sure what the Trill lifespan is, but Curzon was definitely elderly when he was a bit over 100 years old. Symbionts usually join with hosts around age 20, so if every host lived to 100 (which they probably didn’t) then that would only make Tal somewhere around 400 years old. The most shocking thing about this is that Starfleet actually kept the same uniform design for 400 years. Unprecedented! Maybe my math or understanding of Trill biology is wrong here, and I hope it is because I love the idea of Kasha Tal getting to bump elbows with characters from Picard and Lower Decks!
Tal C. is also clearly a Starfleet officer, but from an era we haven’t seen, and the others have no uniform to give them away, so it’s impossible to identify Tal B, C, and D. If I were to make an educated guess, it seems like Tal might alternate careers in starfleet and careers elsewhere, in which case Tal C is probably Madela. D and B are less certain, but the face that they’re standing next to each other in the circle (although the are clearly not standing in order, since Senna is in the middle) makes me suspect that B is Jovar and D is Cara.