Mountain Lions
Thinking of a group name! These are the main "villains" of HushClan and SpireClan, primarily HushClan.
When HushClan cats first came to the mountain, the mountain lions were pushed back out of their ancestral territory. As the invasive cats expand, they're forced to hunt further back into the mountains where food is scarce.
Though usually solitary animals, they've begun forming a group to push back against HushClan and reclaim their territory.