Adeleas and Vandene Namelle Love
Because there isn't enough of it.
We are talking sisters biologically who moved through the Tower in lockstep despite not actually being twins, Adeleas being two years older. Sisters who chose different Ajahs and despite the institution of the Tower doing it's best to break ties to anything other than it in its potential members, were still so close that people could not tell them apart.
Sisters who retired together to study despite only one of them being a Brown, sisters who moved as one after Moiraine's visit to do something about the Last Battle. Sisters who got caught up in the craziness of Ebou Dar and were the only Aes Sedai that were helpful to our main characters. Sisters who following the death of one, the other became hellbent on discovering the identity of the murderer and succeeded in avenging the death all while being some of the oldest known sisters in the White Tower.
