Regina first hears the name when she is a child. Mother is stomping down the hallway, muttering about 'Eva', and Regina asks "Who's that?" Mother turns and Regina flinches. That is when she realises the name is a Danger. Or, all those times Regina heard Queen Eva's name and wished she could forget all the memories that came with it. (T warning: brief mention of rape)
The Dark Curse has been cast, bringing surprises all round, not least for the Evil Queen who doesn't know how to handle a woman she thought was dead. But soon it's clear to all the major players that things aren't happening quite how they'd planned, and this so-called Saviour isn't as effective as they had hoped she'd be. Follows on from 'A Shift in Power', read that first :)