Sephnit
An apparently evil family that clashed with the Sophnits. Sephnita was their leader, the "Ruby God".
Each member was sealed in his or her own ruby--in such a form, one who possessed the ruby possessed the mage's power. The mages still had the ability to break free of their ruby prisons, though, as evidenced by Member OG 2.
Their powers cause harm, providing opposition for the Sophnit gems. For example, Sephnito had the power to kill, while Sophnito had the power to revive.
The Sephnit jewels were last seen in Member OG 6: VGF Moon, when Akujin absorbed them all into his Akujin Eye to increase his power. Akujin was destroyed soon afterwards. It is presumed that the Sephnits were destroyed with him, as they never appeared again.
There was also a third family, the Saphnit, that were briefly mentioned in Member OG 4 and described as all having elemental powers. The only one of this family seen was Saphnity. Gamehiker Member OG VIII: The Final Parody also featured a new jewel spirit (the only one seen so far in the Good Timeline) called Siphnitty.