Actually, Tenjo Hikari was like this before.
Flame Sword saw Ed, thought it was fake too, instinctively wanted to assist Tenjo Hikari, but in reality, it wasn't the case at all.
Even though Tenjo Hikari judged the interrogation machine by the detail of the "name field," in fact, he had already talked to the "interrogation machine" for quite a while before and carefully observed many details.
He was prepared for being backstabbed, so he observed particularly carefully, therefore even if it looked almost identical to Ed, Tenjo Hikari still found some strange discord.
It was under such circumstances that Tenjo Hikari asked the name question to see if there was any odd reaction.
Moreover, this was just one aspect of Tenjo Hikari's judgment.
Before, when he called Flame Sword to attack the interrogation machine, he used his own Duel Energy to provide "power," even if Tenjo Hikari made a mistake, any spirit next to "Ed" could withstand Tenjo Hikari's power at that time.
But Flame Sword had just appeared spontaneously without hesitation, using entirely his strength, if a real Ed wasn't prepared, he might have gotten hurt.
So these things couldn't be absolutely guaranteed, Tenjo Hikari couldn't let this sort of thing happen.
Luckily, Ed also faced a similar situation, so he knew Flame Sword was protecting Tenjo Hikari and did not get angry because of Flame Sword's actions.
But what followed was more serious and intense communication.
Even he, even Tenjo Hikari could be imitated, and outwardly, behavior-wise, there was no strange thing to be seen; this incident was probably quite serious.
"How exactly is it done?" Ed furrowed his brows.
A bunch of spirits, not necessarily seen by him and Tenjo Hikari, how did they manage to act so similarly in their presence?
"I just thought about it for a while." Tenjo Hikari put away his things, led Ed towards the academy building, and started discussing with Ed along the way, "If they directly copied our behavior, habits, appearance, even if possible, it's too cumbersome."
Ed nodded.
"So, there might be a more convenient method."
"More convenient?"
"Psychological effect—"
"Ah—oh! That's it."
Through simple human disguise and psychological suggestion, letting those they meet instinctively feel that there's almost no difference with the person in their impressions, unless there are exceptionally absurd characteristics or features, otherwise it should be easily disguised.
And this should also be Darkness's most proficient, most skilled aspect.
Simple, convenient, yet efficient, for those spirits with varying levels, it's also a very handy disguise.
No need to be so delicate, just come and get it done.
Tenjo Hikari took out a mirror, simply glanced at himself, seeing both Tenjo Hikari and Ed in the mirror appeared normal.
Tenjo Hikari really didn't expect this "Psychological Observation Mirror" could come in handy.
And its use seems to be increasing.
"Who exactly did something like this?" Ed still had many confusions.
Tenjo Hikari thought for a bit, took out information heard from ZONE earlier, and shared and explained it with Ed.
Something about humanity's ultimate doom destiny, some ultimate darkness, some "evil spirits born from the destined doomed conclusion," these things were too vague and too bizarre, but luckily Ed's acceptance was strong, after accepting this information, he expressed understanding.
On the way to the academy building, they also encountered others, Tenjo Hikari tested with the mirror, and sure enough, they were spirits, only saying the Mind Mirror's value was rising.
Not surprisingly, Tenjo Hikari planned to improve and mass-produce, make some "Truth-Seeing Glasses."
Although Tenjo Hikari estimated, soon these spirits would remove their disguise and come hard, but use it for one more day if possible.
Not knowing how many spirits mixed onto Academy Island, Tenjo Hikari and Ed rushed and hurried to the academy building, quickly finding the professor.
At this moment, Professor Cronos was also extremely busy.
He tried to connect with the outside world, but the whole Academy Island was locked down, completely unable to reach outsiders.
As a last resort, he quickly notified all teachers and professors to assemble, but even at this point in time, teachers and professors hadn't all arrived yet, it seemed quite a few professors even encountered trouble!
Upon seeing Tenjo Hikari and Ed, he first breathed a sigh of relief—after all, Tenjo Hikari wasn't harmed, but immediately after, he let out a sharp howl, a scream of terror.
How did Ed Phoenix come to school!
From the academy's development standpoint, Ed coming to school, as the acting principal, he was naturally happy, after all, such a star Professional Duelist coming to study can give their school significant acclaim, ensuring the new student intake next semester isn't a concern.
But now, if Ed Phoenix encounters any mishap in the academy, hiding the news would be impossible.
Yet Tenjo Hikari felt this was a bit overly worrisome.
If even Ed couldn't hold on, then the academy probably wouldn't have many people left, no need to worry—at least that's how it was originally, even Ed, Caesar fell, how many people can remain.
After this interlude, Tenjo Hikari and Ed temporarily stayed in the school building, watching a large group of teachers chatter about the incident.
As Duel Academy's teachers and professors, they had seen many strange incidents, with Tenjo Hikari's intel and details, they quickly summated some methods for protecting students.
"Dorm heads of Red Academy, Yellow Academy, Girls Academy," Professor Cronos called to the teachers, "Next, you three are responsible for leading the teams, act together, ensure all children have reached their respective dorms."
Professor Cronos took a deep breath: "As teachers of our sacred Duel Academy, we must lead by example, so this action, I as the dorm head of Blue Academy will also be searching for students."
The teachers responded.
"Instructor Napoleon, if I encounter any accident..." Turning around, Professor Cronos began to "prepare final words."
"What are you talking about, Cronos Acting Principal." Instructor Napoleon wiped his cold sweat with a handkerchief, saying, "You're just an acting principal, the position can't be succeeded."
"But I'm still the principal—"
Professor Cronos and Instructor Napoleon engaged in their usual banter, but this time, clearly Instructor Napoleon wasn't as hostile towards the professor as before.
Tenjo Hikari was a bit uneasy, feeling the best choice should be all teachers acting together, so even if any crisis arises, they can mutually support each other, but...
Duel Academy's students were inherently lively, after a day of courses, some played tennis, some dove, some trained deep in the mountains, and those sleeping in high-rise buildings were particularly dangerous.
Due to such reasons, teachers had to split up to find them, otherwise if those unfamiliar with other students' conditions were attacked by disguised spirits, the chances of injuries, serious injuries, even unconsciousness are far higher than active students.
However, both Tenjo Hikari and Professor Cronos's worries seemed overly cautious.
It seems after the initial attack, the spirits gradually retreated, or—
This first probe was just the spirits experimentally attacking, understanding the students' basic qualities and Dueling Ability, then gradually fading away.
So, on the second day in the morning, almost all students gathered at the school entrance.
Many students had bruises on their faces and bodies, clearly showing they were attacked.
Fusion Department students conversed with each other, chatting about last night's events, discussing fervently.
Quite a few looked very downcast.
Professor Cobra glanced at the students, finding Kagurazaka among them.
He looked extremely upset now, head lowered, appearing very self-blaming, presumably something happened last night that injured his friends or himself.
Everything was within Yubel's plan.
Professor Cobra couldn't help but lament.
For a moment, he wanted to come up with other ideas to help his colleagues.
But—
When his eyes reflected the image of his son, the last hesitation vanished completely, leaving only determination.
No matter what, he still wanted to see his son one more time.