The Slouches are failed Fatty monsters. These ANMC are actually more dangerous than the others in this class because their attacks are far more accurate and many of them are fought in close quarters.
Slouches are not too difficult to kill, having less than half of the HP of their Brute cousins while still bearing the same weakness to critical hits. They can flail their arm but also spit poison, which strikes at surprising range and can lead to damage at greater distances then a player would expect. Even when suffering from PARALYSIS, the arm can still harm Aya, so take care should the player ever get too close to one.