User blog comment:B214/Volume 23 discussion blog/@comment-31137559-20170324154724/@comment-10330822-20170324161215

I think she was the Head of Belphagor before she defected to play in the Rating Games. And then when she was removed from the Rating Games as a King and her King Piece was deactivated, she returned to her house and they shunned her.

In short, she had already burned the bridge to her clan before joining the Rating Games, it was just when she returned to Belphagor and they shunned her because of it, it left her with no where to go.

As a result, Ruval is helping her, which leads her to Ravel and Issei.