Monika Drevis

Monika Drevis (née Stephenson) was the wife of Alfred Drevis, and Alice Stephenson's sister.

Trivia

 * Monika is a name meaning 'adviser' or 'unique.'
 * She was a yandere.
 * According to Sage, she killed a woman and arranged it to look like a suicide after the woman flirted with Alfred.
 * Her sister is also a yandere.
 * For whatever reason, she paid extra attention to Aya in contrast to Dio. Sage hasn't made why clear, but it's probably something crazy to match the rest of the family.