Silvia

Silvia (シルビア) is a sadistic Royal Maid and a Saint.

Background
Silvia is the Head Maid of the Royal Family; as such, she also has the role of being the priestess who passes down the divine right to rule from God to the Royal Family.

She was travelling the world to hone her "Bonne Damme" skills when she met Ollerus; how they met and the circumstances behind it are unclear, but it appears they've known each other for awhile and have become a duo.

Personality
Silvia comes over as callous and sadistic, especially to Ollerus, but still has a good side, like when Ollerus brought to their apartment one-hundred children he rescued from human traffickers and she decided to let them in and find them homes, even though she was angry at Ollerus about the whole thing.

Silvia is quite cruel to Ollerus on the surface and scolds him for being an "idiot to the core", but still cares for him deep down and feels an urge to protect him, and it is heavily implied she is in love with him.

Appearance
Silvia is blonde woman with blue eyes who wears a thick dark-coloured jacket and a work apron. She wears goggles on her forehead for some reason.

Gemstone Incident Arc
Silvia first appears in Volume SS2. She is seen chiding at Ollerus after he returns from destroying a child trafficking organization and bringing to their apartment about one-hundred children. Since he had no idea what to do with them, he brought them with him until they can find homes. There, Silvia berates him for making promises he can't keep and straddles him to the doghouse in their apartment's yard with rope, applying painful pressure to his crotch. Despite that, Silvia takes the children in. After dealing with that trouble and finding one-hundred blankets so the kids could sleep, Silvia goes back to Ollerus, where they discuss that some of the one-hundred children were marked and shared certain characteristics — that of Gemstones. Ollerus disappears later that day.

Later, Silvia placed most of the children in foster homes. Some remain not because they can't be adopted but because they want to thank Ollerus personally. She thinks that she has no reason to stay in the apartment now that Ollerus is gone. Plus, she's been repeatedly been called back to the United Kingdom and isn't getting paid for staying with Ollerus and cleaning up after his mess, as in a typical Master–Servant relationship. However, she has a very stupid reason to stay (love). Ollerus then returns, and she greets him rudely, as always.

World War III Arc
Having observed the Third World War from the sidelines besides Ollerus, Silvia appeared at the end of Volume 22 to rescue a dying Fiamma of the Right from the snow after his defeat at the hands of Aleister Crowley.

Baggage City Arc
She appears accompanied by Leivinia Birdway to help a fellow Saint, Brunhild Eiktobel, deal with artificial Valkyries sent after her by GREMLIN to acquire certain knowledge Othinus needs to craft Gungnir — a feat Brunhild accomplished with a 70% powered replica. They do manage to steal the knowledge by distracting Brunhild's mind, but the three set out to pursue them to their headquarters and get back the stolen knowledge.

Abilities
Not much is known about Silvia's powers other than she's a Saint, but Carissa and Knight Leader think that she would have caused them trouble if she had been in the United Kingdom during their coup d'état.

Design evolution
Silvia's design remains static throughout the series. Haimura summarizes Silvia as a domineering wife.

Quotes

 * (Silvia, reacting to Ollerus bringing in one-hundred children): "You damn dust-covered ruined noble... If that was really how the world worked, things wouldn’t be so haaaaaaaaaaaarrrrrrrrdddddd!! [...] You can say all the self-important things you want, but how do you think we’re going to feed all of them, hmm!? You’re always making these promises you can’t keep! Come here a second!! I think I’ll tie you up with rope and make you straddle the dog house!! Since you don’t seem to know what it means to anger Bonne Dame Silvia, I need to carve it into your body!!"
 * (Silvia, talking about Ollerus): "Well, that’s just who he is. He’s an idiot to the core. And whenever I look at that idiot, I get the idiotic idea that I should protect him. Thanks to that, I haven’t gone back to England and just stay here."
 * (Silvia, as she greets Ollerus in SS2): "Hey, welcome back, you dumb bastard."