Edea is going to be Type B all the way! It's the only thing that will really motivate her; she'll think any other reasoning is pretty cowardly and backhanded. She's not too squeamish about death since she's seen so many people die - she doesn't like it at all, but she will definitely think it's the right thing to do here. If the others are averse to it, she wouldn't mind relieving them of some of the burden by being the one to actually carry it out, if they can't stomach it. She'll probably insist on being present at most of the deaths just so she can be satisfied that it's happening as humanely as possible and no one's botching it up. Even if it's a dream, it should be done right!

She'll advocate for killing the most innocent people first, but, uh, she can be persuaded otherwise.

Her prize will be a lifetime's supply of jam and butter omelettes so.

I mean, she'll be pretty thrilled about that, too.