Quaternion

The Quaternion was the team name for the original four SuperNaturals members: Hydron, Pyros, Lithionator, and Electroid. They picked up this name once the SN got larger than just them, but as it grew to its current size, they "disbanded" the Quaternion since they rarely did any missions together, much less only the four of them, plus the idea seemed a bit elitist with so many new recruits joining.