How do you unlock the third furry? Do you need to beat the game? That feels counterproductive.
Viewing post in Alpha 0.4 - Quests, Bosses and a new Furry! comments
Yeah, you need to finish the nightshade quest given to you in the wolves' den, and the third furry girl is then unlocked as a reward. If you haven't done it already, as a tip I'd recommend leveling your furries to at least lvl 52 to make the wolf boss battle easier, since she has 2 phases, of which the second is much tankier than the previous AND she is immune to stuns.