TenSoon is of the same generation as OreSeur, the kandra whose contract was purchased by Kelsier and passed to Vin. Under orders from Zane, who had TenSoon's contract from Straff Venture, the kandra tortured, killed, digested, and replaced OreSeur. He was the first kandra to ever kill and replace another kandra. He possesses the Blessing of Potency, stolen from OreSeur's corpse, as well as his own Blessing of Presence. Because of this, he is believed to be one of the strongest kandra ever.