Rudy told Nyxia everything, including about the girls in his harem and his actions. He also told her about his past life and how his loved ones met a tragic end.
"Hmm. So you are from another world… no, another universe?" Nyxia didn't look surprised, but she was amused.
"Something like that. But it's only my soul… or rather, the memories that traveled through the universe."
"Unfortunately, I do not possess knowledge about the multiverse, but I did believe that it was real."
Nyxia looked at her hand and said, "Do you think that we have met in your past life too?"
"No…? I never came to the vampire world. In fact, I never remembered Rias," Rudy responded in frustration.
"Can I ask why you think you are Rudy from another world? It could be that you only gained the memories because of some strange phenomena, you know?" Nyxia asked curiously.
"I thought of that possibility. But I debunked it. Firstly, when I came into this world… in this universe."
The conversation was getting weird since, so far, Rudy had been using the word world, but currently, he was in a vampire world, and things could get confusing.
"When I woke up in the universe after dying in the other one, I was back in time. I didn't wake up at the present time. Secondly, I didn't remember anything about this world. I didn't know about the apocalypse or anything else. And thirdly… Well, there is none."
He shrugged his shoulders.
"I wish I could help you more with that."
"It's okay."
Nyxia smirked from the corner of her lips and said, "Are you aware that polygamy is not allowed in the vampire world?"
"That's a lie. Virgil married three times."
"Not at the same time. He married his second wife after the first wife died. And he married his third wife after the second wife left him. While you are fooling with Jane and Glorias at the same time," Nyxia retorted.
"No offense, but I don't give a fuck about the vampire world rules. I don't care if polygamy is not allowed. Who is going to stop me?" he scoffed arrogantly.
"Still, if you had to choose one between Glorias and Jane. Who would you choose?" she asked with a curious and amused look on her face.
"Rias, anytime," Rudy replied instantly. "It's not like I don't love Jane, or I love Rias more than Jane. It's just that I came here for Rias, and that hasn't changed."
Nyxia licked her lips and uttered, "I see. So you are a loyal cheater."
"..."
"And I was kidding about the polygamy part. There is no such rule," she groaned.
"I figured."
"Say, are you not curious where this vampire world exists? Like your human world is a blue planet. Do you not want to know if there is a Vampire Planet or something?"
"It's called earth," Rudy commented.
Nyxia shrugged her shoulders arrogantly and said, "Why should I care? It's named after a human. I will never call a human by their name. I despise them."
"I am a human too. And is that why you have been calling me 'boy' all this time?"
"I do not hate you personally, but I don't think I will ever call you by your name."
"Oh? And here I was longing to hear my name in a sweet voice from your lovely mouth. But I guess that is never going to happen," he said with a dejected look on his face.
He made a gloomy face on purpose to tease Nyxia, and it worked.
Nyxia was flustered. She gritted her teeth and muttered, "You are so cocky…"
"Heh." Rudy grinned and said, "It's okay. I don't mind it. If I hate someone, I wouldn't call them by their name either. I respect your ideals."
"..."
"Also, I was curious about what you said, actually. But I don't want to know. It's probably because of magic, and it messes with my head since it contradicts my favorite subject, science."
"You look awfully exhausted even after relaxing in the hot sprint," Nyxia commented.
"This is mental exhaustion. Physically, I rarely feel tired."
"I am more curious about your powers. Where do they come from? How do you create them?"
Rudy shrugged his shoulders and responded, "I don't know. But it sucks my mental strength, so I guess my powers come from my imagination?"
"I have never seen such phenomena in my entire life… except…" Nyxia uttered in a low voice.
"How old are you, by the way?" Rudy asked with a curious yet calm look on his face. "You mentioned yourself as an ancient vampire, so you must be thousands of years old. Then again, that's every vampire."
Nyxia furrowed her brows and uttered, "Don't you know it's inappropriate to ask a girl about her age?"
"I expected that line. Come on, tell me."
"I am sorry, but that's the only thing I can't tell."
"Why not? What if I give you something in return?" Rudy asked with a judging look on his face.
"Like…?"
Rudy pointed his gaze at his snake and said, "Whatever you want?"
Nyxia stared at Rudy's snake and licked her lips. She gulped down with an alluring gaze and took deep breaths.
"That won't do. Even if you sleep with me, I cannot tell you that."
"Okay."
'Was he serious about that?" Nyxia wondered. 'No, he was probably joking. He wouldn't agree to do something like that just to know my age. I may not know him well, but he doesn't seem like that type of person.'
'But…' Nyxia shot a glance at Rudy's erect snake and thought, 'What if he was serious. It's not a bad offer. I can just lie about my age and get laid too… no, I can't do that to him.'
Rudy raised his brows and wondered, 'Why is she being so agitated about her age? It's not that big of a deal, right?'
"Say, boy." Nyxia squinted her eyes and uttered, "There is a spirit living inside you. Your lover, as you mentioned her. Do you know the risks of letting a spirit possess you?"
Thanks, @Asmo94, for the gift!