Konton is the heir of uzugakure. Though when the uzumaki clan was scattered after the remains of the old war, Konton's father was able to gather the remaining uzumaki he could find... however when Konton turned 12 he and his newly acquired friend naoumi were taken by orochimaru while the rest of the uzumaki were killed... When they awoken they were tampered with, Konton with the power of the sharingan, and Naoumi the power of the chakra chains.
Narumi is also a uzumaki, however not from royal blood, she knows her fights after training with Konton.

(From my Two Uzumaki's book!)

if you use my oc please give me credit.