My third point is this picture:
It's from the season finale. It seems that Mako might have had a realization (about Amon) and is confused. As well as seeing what his father is doing to his love must be very heartbreaking.
He's being bloodbent right there
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_foolmo_
'It's easy to get yourself in trouble if you start quoting people who don't like you in your signature' - Mods