Board Thread:Show-Related Questions and Answers/@comment-34924658-20151201003822/@comment-25926288-20151201025042

Tysonjackson wrote: Well by Big Bad I mean main antagonist. I say its probably Nimue since Emma and Hook have both been main antagonists in the present time this season and she was indirectly behind them... well actually directly with Hook. The Darkness is the Big Bad. Emma and Hook were fighting the Darkness and the Nevengers were fighting the Darkness inside Emma.

Since Nimue is the Darkness you could say Nimue, or just the Darkness.

Emma was a major one, all other minor since they had smaller roles in the plot and for not as long.