Reina Oriana

Reina Oriana (レイナ・オリアナ) was the Queen of the Oriana Kingdom and Rose's mother. It is eventually revealed, however, that she was a traitor to her country and family, collaborating with the Cult of Diablos.

Appearance
Reina looked like an older version of Rose Oriana

Powers & Abilities
Reina had seemingly no combat abilities at all. However, being the queen of the Oriana Kingdom, she likely held some political influence, but not much since she married into the royal family.

Raphael Oriana
Reina's late husband. Initially, she appeared to have been quite loyal to Raphael, serving as his food taster in case it was poisoned. At some point, however, she began a long-term affair with Perv Asshat and betrayed her husband by allowing the counselor to drug him, which she seemingly had no regrets about.

In the end, Reina received her comeuppance when Rose activated the "Ring of Succession" that projected an image of Raphael who exposed Reina's crimes, revealing that he was aware that she had betrayed him all along.

Rose Oriana
Reina's daughter. Initially, Rose saw her mother and protect her from 559 attack, unaware of her true nature. Because Reina's love for Perv, she only saw her own daughter nothing, but a hinderance and want her dead as soon as possible, which Perv promise to Reina that Rose will be dealt with once the wedding ceremony is over.

In the end, Reina received her comeuppance when Rose activated the "Ring of Succession" which exposing Reina's crimes and when Reina saw Rose kills Perv by beheading him (unbeknownst that it was Mordred doing), she called her daughter a monster.

Perv Asshat
Reina expresses the downright insidious desire for Perv to kill her own daughter, Rose after he's married into the family so they can finally be officially together as lovers. She thinks that she and Perv are in love, but Perv only sees her as a means to claim the throne.

This never came to fruition as she watches in horror as Rose mortally wounds and seemingly decapitates her beloved on their wedding day followed up by Mordred finishing her off in her despair.

Trivia

 * Her Reina's name is Spanish for "Queen".
 * Reina is the first true female antagonist of the series.