Slade

Slade is not a wolf most would consider friendly, he will not hurt pack, but he will purposely go out of his way to put things like sticks in the paths that herbalist takes. Though those things do not happen very often, if so Dove would not have allowed him to stay.
In his later months his original job as Scout became too much and he retired into the role of a mentor. The first mentor of the pack. The other pack members questioned Dove and Crow's choice to allow him near pups but Dove said his skills would be best and that he never showed ill will towards a pup.
The pack already knew that Bren and Slade were training their replacements, aware that their time was running out. Rose was Slade's main trainee and thus took Slade's previous job while he mentored pups until he couldn't anymore.