Arien is the one with the Heibi powers so I have a feeling that she will have her own guardian or something similar.
Oh yeah that makes sense, I also had the same question as OP also sense they were that bitches children they should have got some sort of power from her bc they both have red eyes just like her
Also Arjen(don’t hate me it it’s spelled wrong) has a stronger connect to their current guardian. So Arien might have all of the powers while he keeps the guardian.
But, if they share only 1 gardian, what will happen in the future when they will have to part ways or are they gonna live together forever? If they are both in danger what will he do? One of them will give the guardian up to the other like the emperor did for his wife? Will they have heibi powers? Too many questions