[Mairsile]

Originally Posted by Dark Faith

After today's episode, I got a hunch that the second ending hints/flatly states who the other titans are.

Spoiler:

http://www.youtube.com/watch?v=sjKxEpeew_c <- 0:25 mark
Seeing how some anime like dropping hints on their Opening/Ending sequences, and how some people (myself included) already believe that Annie and Reiner are titans... Dunno. Could be a coincidence, but I don't feel that's the case

Yep. And it seems the

Spoiler:

mural behind each character, or set of characters, likely depicts an event in their past. So if we go by this, then the remaining two pairs featured are Reiner and Bertholdt and Ymir and Christa.