Maria Naruse | The Testament of Sister New Devil

"You know, in the demon realm, this kind of thing isn’t considered a big deal."

Maria Naruse is a succubus and Mio Naruse's Guardian after the death of her adoptive parents. She is the daughter of Sheila and the half-younger sister of Lucia. It is later revealed that Maria is also the daughter of Wilbert, thus making her the niece of Sapphire, the younger half-sister of Mio, and the cousin of Basara Toujou.

Appearance:

Maria is a petite beautiful girl with long silver hair and purple eyes in her human form most of the time. She is seen dressed in a black dress that has white frills most of the time and what seems to be like a functional keyhole on her collar, where her magical key is meant to be inserted in, black leggings, and boots that have purple hearts on them.

In her succubus form, she has slit purple eyes and small black horns on her head, dressed in a black leather revealing outfit, white leggings with light pink horizontal stripes, and black boots, as well as small black wings located near her waist.

When using her Magic Key, Maria takes on the form of a full-grown older woman with a curvaceous figure, large breasts surpassing Mio, and taller and slender compared to Yuki, as well as thick black gauntlets.

In volume 11, when she uses her Reverse Magic Key, instead of taking on the form of a curvaceous older woman, Maria maintains her normal stature. While in this form, Maria has thicker and longer black horns, a longer tail, and a more elaborate cross-shaped keyhole.

Personality:

Maria is rather childish and likes teasing people no matter how serious the situation. She prides herself on trying to make light of most situations to counter the seriousness of Basara and the rest of the harem. She's often referred to as being the "problematic" member of the family due to how brutally honest she is about her feelings and desires.

Being a succubus, Maria naturally feeds off of the lewd situations. In the first half of the series, she's primarily scheming and watching Basara engage in lewd acts with the rest of the harem in order to deepen their bonds. However, in the second half of the series, she becomes an active participant in the lewd situations, and even discovers