Sylphy

Sylphy (シルフィ) was Regulus Corneas' 184th wife until Regulus' death at the hands of Reinhard van Astrea, Natsuki Subaru, and Emilia.

Though having minimal screen time in Arc 5 and not appearing in the following Arcs, she played a mildly-considerable role in taking down the Sin Archbishop of Greed by providing the Greed Subjugation Squad with valuable info about Regulus. Following her husband's death, it's unknown where she went or what she's doing.

Appearance
Sylphy is a woman with golden blonde hair and dark blue eyes. She has similar hair to that of Emilia and noticeable cute features. She also wears a dress.

Personality
Due to years and years of having to live in fear of being killed for even smiling in front of Regulus, Sylphy developed a cold and emotionless personality which might have made her look like an empathic and uncaring person, though that couldn't be further from the truth.

History
Somewhere in the past, Sylphy married to Regulus Corneas, becoming his 184th wife.

Eventually, Regulus traveled with his wives to Priestella, where he wanted to marry Emilia. However, he ended up being confronted by Natsuki Subaru and Reinhard van Astrea.

During the battle, Emilia tried to ask Sylphy for a way to save everyone and stop Regulus, to which she responded that there was no way. Sylphy was ready to kill herself, but Emilia didn't agree with such solution. The wives, including Sylphy, were frozen by Emilia's magic, so that Regulus wouldn't be able to use his authority. After Regulus Corneas was successfully defeated, Emilia freed all the wives.