HP drain: very notably, Orchid Widler, also known as Oncidium. Relatively common, since many people got her for their first 5* pull.
Counter-attack: Hypericum and Mirabilis, both were event girls recently.
Dodge girls: There are a couple 5* star with that ability, but I don't believe there were any event girls with that yet (though I might just not have noticed, lol)
Hit-all or AOE girls: several. Of the event girls, Edelweiss hits 2 targets extremely hard (especially for an event girl), but I've grown really fond of Hypericum (hits 3 targets) as well.

Uhm, yeah, I'm really biased about Hypericum, her awesome performance is probably also because she's the one wearing the Halloween jewelry, but she's also just soo adorkable.