For all those that are hoping for Sonia Belmont to be in LoS2:
I don't mean to burst anyone's bubble, but look no further than the treatment they gave Sypha in Mirror of Fate. The chances of MS putting a reimagined Sonia in LoS2 are extremely low, and it's more likely that the name 'Sonia' will only be randomly namedropped in a Brotherhood Scroll you find along the way, similar to 'Iris' in LoS1. Seriously, that's the best we could hope for.