...yes. I don't really see how a pupil could carry out something like this, anyhow... and really, I don't see why my father would've bothered with us or even settling down in the first place if he had a pupil this powerful. Plus, Amon would have to be able to do most of it without accompanying hand motions to direct the bloodbending, which...

...

Unless I'm far off course or there are a staggering number of coincidences at play here, the only person Amon could possibly be is my brother.