In the Tiny Tina DLC, Lilith mentions being bullied for having tatoos when she was a child. According to Maya’s bio on the Borderlands Wiki, it seems she was raised as a Siren by a group who wanted to exploit her powers for their own power seen in her ECHO logs.
Certainly, it seems like the most logical explanation. Sirens are born, but as soon as one dies, a random girl becomes a Siren, I guess either in childbirth or perhaps in conception? So like others theorise, Steele died 10 years ago, meaning that the girl Maya is with could be a 10 year old Siren, and that there is a 5 year old Siren somewhere out there after Angel died.
I’ve always wondered about the Sirens in the Borderlands universe, mainly about how everyone knows Sirens exist, and how everyone also knows that only 6 can exist in the universe at any given time. Certainly though, it seems like Sirens are going to be a massive focus in BL3, and we might find out the identities of the 6 Sirens currently alive. It seems like there is something weird about Tyreen though considering she seems to absord Lilith’s power, which makes me wonder if she isn’t a Siren but maybe has some sortof other alien ability that effects them?
The only downside I guess is that it seems like we are running out of Sirens to be able to play as. I’m sure I read somewhere that apparently at some point in the past, there were meant to be 13 Sirens in the universe but it got changed to 6. Honestly, I wish that was the case, so that we could always have some unknown Sirens so that there can always be one for the next game.