Meet Ken.
He's a fennec fox.
He's a mercenary.
He's generally unpredictable if you're not his friend.
He's generally reliable if you are his friend.
And he's got a few friends.
He'll do anything you pay him to do: eliminate, steal, host birthday parties, give hugs (one of many things he charges extra for)...
He needs no belt to hold his blade; the sheath is durable and doubles as a club in his other hand, allowing him to dual-wield.
He has a mouth; it's just he doesn't smile very often.