I suggest we roll all of the combat and then summarize it in one post. Or whenever one of us thinks there is enough to narrate.
Either way, Asenath will swiftly step up to the mercenary and whack him with her poleaxe.
I rolled two dice (no momentum to spend yet) for [4, 17], meaning three successes.
Assuming he is a Minion (btw, how easy is it to detect whether someone is Minion, Toughened or Nemesis?) he can't use reactions, which means this are two extra successes, resulting in two momentum. I put them into the pool for now.
Next I roll damage. The ploeaxe does 4 damage, plus 4 from my Brawn 14. So 8d6 result in [ 1, 1, 3, 3, 2, 3, 5, 6].
Asenath has the No Mercy talent, which is currently her only melee talent, she can reroll one of the 3s resulting in another 5, for an end result of [ 1, 1, 5, 3, 2, 3, 5, 6]. That is 7 damage and 3 effects.
The poleaxe has the Vicious quality, so these three effects result in another three damage, for 10 total.
The poleaxe also has the Piercing quality, so the three effects also reduce the targets soak by up to 3.
Assuming he does not have more than 3 armor, that is 10 damage, which results in at least one harm (5 or more damage in one hit). The poleaxe also has the Intense quality, so that one harm becomes two.
The latter is irrelevant, since it only takes one harm to down a minion.
If he is not a Minion you can try to defend, of course.