Hmm so he grew up with the imperials so he was a little diffrent then the dunmer's point of view?
Barenziah married King Eadwyre of Wayrest, and thus she became the Queen of Wayrest. It is here that Helseth and Morgiah grew up together. Whilst Morgiah had her own schemes in order to become
, Helseth was constantly competing with his step sister Elysana for who would become the next in line for the throne. The two were constantly plotting, blackmailing, scheming to secure power for themselves. Following the death of King Eadwyre, Elysana took the throne, so Helseth and Barenziah moved back to Mournhold.
As a result, Helseth is an outlander and comparable to House Hlaalu in that he's among the more "Imperialized" Dunmer.