[Desdinova]

Originally posted by Baron Munchausen:
They also never explained what the 'exchange of souls' between the two races was about.

they never diretly explained it but they did give several hints. commander sinclair went back in time with B4 and was changed into a membari using the triluminary and became known as valen. they used the triluminary on sinclair at the battle of the line, and it glowed thus the membari thought that human had somehow gained membari souls. also dalenn used the triluminary to changed herself, it was also rumored that she is a decendant of valen/commander sinclair. the triluminary also glowed when it was put near her.