Mary

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"A red demon, isn't it?" Said my mother. "It is nice to meet you."

"I-I would prefer if you called me by my name rather than my… disgraceful race." Sighed Mary while nervously averting her gaze from us, she seemed to have a hard time keeping eye contact.

"S-Sure, sorry about that." Said my mother.

And then, Mary pointed out at the other Nun, who was silently staring at us. She was covering her face with a black, semi-transparent veil, and only her eyes could be seen. But from the looks of it, she had brown skin and beautiful golden eyes, she also had pointy ears that emerged from her nun hat, and there was also blonde hair that could be clearly seen.

However, the most surprising part of her was her lower half, she lacked legs, and instead, had a very long and large snake tail. I've read about these people before from the books my parents had back home, she was a Lamia.