Hmm so I went through all the debuff girls and I must say I like Apple a lot, Onci aint bad and Stock seems pretty decent.
The problem is... none of these are Blunt type, and for my counter team I already have all the other spaces filled with girl who do their job rather nicely.
Saffron - now Mistletoe might be better maybe, since she does Counter and Debuff as well, But Saffron is a really really tanky so picking her up should be a no brainer.
With how I set up things it leaves me with Cherry or Ivy. Visually I like neither of them, though Cherry I dislikeeven more (that neon carnival color scheme of hers is all over the place). Admittedly she is pretty solid, with debuff and buff against boss enemies, thus helping even more to take down the one enemy type the Counter needs to deal with and that Is a boss.
Ivy - I don't particularly fancy but at least her looks don't make me wanna vomit. But her abilities feel a bit weak though. Debuff only on 2, which makes it possible to miss the Boss mob when applied. And the rest of her skill set seems pretty meek as well. If she had skill act to go with that skill dmg, that would be the breaking point, but since she doesn't ... ah well.

I suppose waiting and hoping for a better Blunt 6* in the future is the name of the game. Still need bunch of other girls to form the Team and to finish my current Evade team (Freesia), so its not like I need to decide right now.