Disney Descendants: Thanatos and Eira

Something that's been in the works for a while and I finally got some free time to work on them.
Meet my Descendant OCs, Thanatos and Eira, the twin children of Ice Queen Elsa.

Names: Thanatos and Eira
Age: 15
Home: Isle of the Lost (Born and raised) Auradon (Residing as part of King Ben's proclamation)
Family:
Ice Queen Elsa (Mother)
Unknown father
Princess Anna (Aunt)
Prince Kristoff (Uncle)
Olaf (Eira's best friend)
Marshmallow (Thanatos's best friend) 
Powers: both of them have the same powers as their mother, controling ice and snow but it's how they use them that differs. 
Thanatos loves to create blizzards and snowstorms that cause trouble but he hardly ever goes to his full extent which could become deadly. While Eira loves to use hers to create funtimes for everyone around her and beauty in her creations. Both can also use their ice powers to create crystals as weapons just like their mother.

Elsa was banished to the Isle of the Lost along with the other villains because of her villain origins. While there she gives birth to Thanatos and Eira, who spend their childhood trying to fit in with the other children on the isle and listen to their mother's stories of the past. Each child takes a different version of their mother to look up to. Thanatos looks up to the evil Ice Queen and vows to show everyone that he can be just as great a villain as she had been, while Eira looks up to the peaceful and kind Ice Queen her mother is now and vows to show those in Auradon that they were wrong to exile her just because she started out as a villain. While growing up, Thanatos would often have to protect his sister because of her gentle nature which made her the target of a lot of the villain kid's pranks. It was one of those pranks that caused Thanatos to meet Jay and the two became best buddies very quickly. While Eira meet Carlos through pranks as well and formed a strong friendship with him. The two were a little sad when their friends had to leave the Isle to attend school in Auradon, but they were eventually brought to Auradon during King Ben's proclamation to give the children of villains a second chance. When they leave, Elsa has Olaf and Marshmallow follow her children in order to have someway to still be close to them even if she is locked in the barrier. The two snowmen follow the children and also represent their natures as Thanatos is calm until provoked then he hunts his enemy down while Eira is fun loving, gentle, and kind hearted. While in Auradon, Thanatos wants to prove himself to his mother's version of her evil self but is hesitant to actually cause any mischief out of the fear of being sent back to the Isle alone and leaving his sister unprotected as he believes the children in Auradon would bully her because she is the daughter of a villain as far as they are concerned.