OMG,I think i’ve discovered something. So Mako is now a police officer in book 2. The background on this picture (screenshot from the trailer) Seems like cells from a prison. Who is the firebender? I think it’s Mako. Mako is Korra’s boyfriend. Maybe he has discovered that Unalaq makes abuse of Korra’s spiritual power? Maybe Mako just wants to protect Korra fro Unalaq. What do you think?