Gabriel and the Haven folk are Pooka
The only descriptions we've been given are that they are furry, have "twitching ears" and are long-lived shapeshifters that had the majority of their race killed in a massacre. Gabriel and the Haven folk aren't Pooka
The implications that they are is Shimmer712 leading up to trolling us by revealing that they're something else. It was mentioned that their people weren't the only ones targeted and other races were wiped out completely. The Pooka may be one of these.