Cureslimes can be considered a step up from healslimes. While the former are typically limited to using Heal, cureslimes can use Midheal and even Fullheal. Aside from superior curative prowess, cureslimes are also more passable as combative monsters, though they are still very weak when compared to the other monsters they appear alongside of.
Kind-hearted slimes who care more about curing than killing. Commonly called on by the similarly coloured lethal armour. (extended) They'd love to help travellers with healing spells too, but they're terrified of being told off by uptight king slimes.
Note: Cureslimes are also summoned by Lethal armours for backup.