This Sougo Tokiwa (常磐ソウゴ, Tokiwa Sōgo), alternatively spelt Sogo Tokiwa, is the Mirror World version of his real world counterpart who can transform into Kamen Rider Zi-O (Mirror World version).

Unlike his counterpart, the Mirror World version of Sougo has a twisted personality and is much more arrogant.

Forms:
Kamen Rider ZI-O (Mirror World version)

Ridewatches:
-ZI-O Ridewatch (Mirror World version)

Weapons:
Zikan Girade

This info is from FANDOM Wikipedia.