Mural is her mother but she's scared of and hates her.

Mural has a twisted 'love' for Siche and wants to use and control her for power.

Siche sees Denize as her benefactor and best friend, despite having hired him, due to their long lasting relationship.

Denize sees Siche as a friend, but more his boss, as he takes his job very seriously.

Siche loves Phirus as a sister, not because of family but because of a united hatred of their mother, Mural, and how Phirus was treated by her.

Phirus loves and respects Siche, though at first and on occasion is incredibly jealous of her for not only Mural's 'love' of her but also her strength and beauty.