Sirius is one of the twelve Valorplates in Godfall.
Each Valorplate has an ultimate ability called the Archon ability. You will need to fill up an energy bar before you can use this in combat. When you activate Archon Mode, your Amor set’s passive skill will be boosted and you will execute a special skill. It’s currently unknown what the special abilities are for Sirius
Sirius has only been mentioned during the Gamescom Interview. The characteristics of this Valorplate has been described as a Tank class.
How to unlock Sirius?
You need to gather resources in order to unlock the other Valorplates. It’s currently unknown what you need to unlock Sirius.