@autisticburnham I was going to comment on your post with an answer but uhh. It turned out really long. So here is your kinda answer! (Their post can be seen here)
So I have a rough timeline of the symbionts age. This was for my Discovery In Eureka AU. But it is based on the Hosts looks in season 3. I think 280 years. But that's just what I think.
Let's try some very broken math. Kesha looks like 40ish, 60 maybe. They might look younger cause of the technology of that time. The other three looked around that age too. Senna looks 80ish and his actor is too. The max I would say is 100 for Senna. Gray and Adira overlapped with Senna so give like 3 years cause of the show.
Let's say most of them lived to 60. 60 * 4 is 240. Let's say they were roughly 20ish so like 22 when they got Tal. 22 * 4 = 88. 240 - 88 = 152. Then Senna if he also joined at roughly the age of 20 and died at 100ish in canon died in the year 3187. 152 + 80 = 232. Then add the three from Adirays so 232 + 3 = 235.
235! So that's your very rough answer!
But you also have to take in account that all the actors minus Gray, Adira, and Senna were never officially listed. We don’t know who played them. We don’t even know what Jovar, Madela, or Cara actually look like. Cause we were not told which actor was who. Those characters are a guess.
But the real answer is we don't know and probably won't unless Adira gets a backstory episode/guest appearance in the sequel TV show "Star Trek: Starfleet Academy" Where Tilly is a teacher.











