The so-called new hope does not only refer to Shinji and Elquet joining forces to kill Zepia and completely cut off the influence of the "Source Blood".
Vampires suck the blood of others and then inject their own blood into them to turn them into servants. The injected blood is the "source blood" for the object being sucked. The power of a vampire is closely related to blood. The quality of the "source blood" directly affects the strength of the newborn vampire and the speed of transformation.
Once Zepia dies, the "source blood" in Shion's body will lose its power and activity. Although it cannot completely stop the vampire transformation, it will buy more time. This is one reason.
The second reason is also the source of Shinji's confidence that Shion will not reject him—the last "True Ancestor" Arquette.
How did the Dead Apostles first come into being? The True Ancestor sucked blood, and the "degraded body" of the True Ancestor was born, which was the first Dead Apostles. Later, the "Dead Apostles" sucked blood, and the magicians transformed them through research. The source of the Dead Apostles is the True Ancestor, or more precisely, the blood of the True Ancestor. With the blood of the True Ancestor, perhaps one can cure his vampirism.
However, since 800 years ago, some of the True Ancestors have died, some have slept forever, and the only active Princess has only been active for one year in the past 800 years. Shion has no hope of finding her. No one knows how happy Shion was when she saw the arrival of Elquet.
I am also worried. The True Ancestor is even more powerful than "Night of Wallachia". Can I really get his cooperation? Fortunately, the Guardian Knight of the Ancestor, a magician named Matou Shinji who seems to be very close to the True Ancestor, wants to talk to me. If I can seize this opportunity -
"Since Mr. Matou knows my situation, he should know what I want. Since you are willing to talk to me in this way, I must have something you want."
"Ms. Shion is so honest, I should also show my sincerity."
Shinji said, reaching out and pinching Arquette's nose.
"Wake up, wake up."
"Hmm... I'm so sleepy... The sun hasn't set yet, let me sleep for another ten..." Elquet mumbled as if talking in his sleep. For the daughter of the planet, it didn't matter if she didn't breathe.
"Ten minutes?"
"Ten hours..."
"I'll just take up ten minutes of your time, wake up!"
"Not even a minute..."
"Then you will miss out on both dinner and midnight snack today."
In desperation, Shinji had to use his ultimate move.
"Why is this happening?" The princess who occupied Orange's bed finally opened her eyes, only one, and it was half open. "Okay, okay, Shinji is so annoying, only ten minutes."
"Just ten minutes plus a snack in the evening."
"make a deal."
"Can you tell what happened to her?" Shinji pointed at Shion.
"Yes, his blood was sucked by Zepia and he is turning into a Dead Apostle." Although he only took a glance, Elquet still keenly grasped Shion's condition.
"Can you turn her back into a human?"
"Impossible. A human who becomes a vampire can no longer turn back into a human, just like you can't turn back time—"
"That's hard to say."
Orange suddenly interrupted, instantly attracting the attention of two, no, one half-vampire.
"oh?"
"What's the meaning?"
"It's impossible to reverse the time of the entire world, but it's not impossible to reverse or speed up personal time - at least I've seen such examples with my own eyes."
"You saw it with your own eyes?"
When Shinji heard Orange's words, he was stunned at first, but soon he nodded as if he remembered something.
"Ah, yes, it is possible. Turning back time is equivalent to a miracle, and miracles do exist in this world."
"Miracle, you mean—" Shion thought quickly and came to a conclusion in an instant, "—magic?"
"Yes, it is magic."
"Second magic?"
Speaking of interfering with time, the first thing that comes to mind is the second magic "Parallel World Interference". It sounds like a spatial operation, but Shion knows that time and space are originally one.
"No, it's the fifth magic." Orange shook his head, and the transparent surface of his glasses reflected a blurry halo.
That was the most painful failure in her life. She was cultivated as a "magician's egg" since she was a child. Before she turned 18, her goal was to inherit the "fifth magic" from her grandfather. However, on her 18th birthday, her grandfather suddenly changed the heir to Aozaki Aoko, who had been living an ordinary life.
This action is a denial of all Orange's efforts and life since she was four years old. She cannot accept this reality, has a split personality, breaks up with her family, and comes to study in the Clock Tower alone. During her study abroad, she studies dolls, runes, magic seals, and fantasy species, and uses whatever means to gain power, just to return to her hometown of Misaki City and fight against her sister who inherited the "fifth magic".
At the end of the 1980s, Orange finally completed all the preparations and returned to Japan with all kinds of trump cards, setting off a riot. At the beginning of the riot, Orange relied on sufficient preparation to fight against Aoko and her old friend, the witch Kuonji Arizuma who inherited the fairy tale magic, and a mysterious boy named Shizuki Kusajuro who accidentally broke in, and still had the upper hand.
Unfortunately, the good times didn't last long. First, Shizuki Sojuro suddenly broke out and defeated Beo, the highest-ranking fantasy golden wolf, whom Orange regarded as his greatest reliance. Then, because of Shizuki Sojuro's death, Aoko decided to use the "fifth magic" to interfere with time, throwing Shizuki Sojuro's death into the distant future, and allowing herself to gain experience ten years later. Finally, she successfully defeated Orange and cursed Orange not to set foot in Misaki City.
Although the nature of the "fifth magic" has not yet been determined, it is possible to interfere with time to obtain the future or change the past.
This experience was processed into a game called "Magician's Night" in another world, and Shinji also knew the Orange King. In addition, he combined the setting that Aoko and the final boss "Goetia" of the first part of "Fate Grand Order" both had the ultimate move "Retrograde Canal Genesis Light Year", and deduced that the fifth law might be related to the "Quantum Fixed Belt" or "Human Principle Foundation".
If this inference is true, the "fifth magic" does have the potential to rewrite the past and subvert the future. Shinji never thought that Orange would take the initiative to talk about the "fifth magic". He invited Orange to participate in the conversation, which had nothing to do with the "fifth magic". He just wanted to rely on her own puppet technology as a bargaining chip to assist Shion.
"Sister, what are you doing—"
"It's nothing. I have to face the past. And seeing Miss Shion reminds me of my past self for some reason."
The same persistence, the same perseverance, especially that look that is full of doubt but stubbornly lurking.
This state is very dangerous. If you are not careful, you may make a mistake. She doesn't want Shion to go the wrong way.
PS: According to the supplementary setting of "Melty Blood", Elquet is very interested in human food. When Elquet disappeared, Shiki posted a note asking her to meet him somewhere, and if she didn't come, he would not help her make breakfast. The princess immediately became scared.