Ok so far there are 8 people in the area on the side of the twins.
2 living souls Gabby and Ella, who are shamans and can summon and control spirits to either fuse with, or combine into weapons making pseudo NP. But for the greater things they need a strong connection to the spirits.
Then there are two servants, Ruber who was Romulus/Quirinus in real life, but this the servant made from the copy of him that lives in the throne of heroes. He can also summon the servant version of his brother Remus, who in this incarnation is Venetus.
But then there are 4 etheral avatar spirits, of Romulus, Remus, Castor and Pollux, which Gabby and Ella can use for shaman magic.
And as all 8 of the are Gemini, it allows for the gemini abilities to be used. Although one twin can only teleport to their counterpart, so Ruber can teleport to Gabby, but not to Ella as they are both the same, if this is making sense. Ella, Romulus/Ruber and Pollux are all echos of each other, the stronger twin, the alpha, compared to Gabby, Remus/Venetus and Castor, who are the weaker twin.
So Gabby is fused with the spirit of Remus, to take on his werewolf traits, while the Servant Venetus is using the sword that has taken on the traits of Castor.
I admit it is confusing.