The mistery here is how Rivera was able to escape from that situation

I was swearing that guy would come as the responsible for the human hacks during the femtoblood era, since he was the one that discovered the vulnerability, and because of that, he or his team could be using the vulnerability for their own benefits. At the end, they never revealed the true culprit. I thought they would work more on that part when Yugure spoke about it when Akira was in sleep mode. The only people smart as Towasa were the Six Sages, so I thought it would be one of them, but nothing. I was thinking about the possibility of AI as well, but if there really was an AI that could hack Towasa's technology, it would try to destroy the world before Towasa even had the chance to create Alpha/Tera.

Can't wait to see Angelica's Magic Sword

Let's pray they make a season 5

They won't appear on this season. They start to appear only on the next part of the series. Hope we get an adaptation of the next part as well

Yeah, but she thought he didn’t realize who she was, since his eyesight is bad.

It seems like someone knows

It was complicated because she was hacking the barrier and rewriting the formula, to make the barrier do something that it wasn't supposed to do originally. But the barrier activated instantly when Monica attacked the school, since the barrier's original function is to protect from external attacks.

The anime is skipping a lot of explanation, so I'll paste the scenes from the light novel here.

Here's the part where it explains why Casey threw Monica's tea in the trash can:

If she became Monica’s friend, she might be able to hear about the second prince’s schedule. That’s why Casey actively interacted with Monica.

Even discarding Monica’s tea leaves during the tea party class was done so that, by extending a helping hand to Monica in her time of trouble, Casey could win her absolute trust. In this way, Casey had always been aiming for a chance to assassinate the second prince.

The scene where Casey says that she hates Monica:

“I hate you, so I decided to do a little prank on you, Monica. Honestly, I aimed that lumber to fall right at you… but I slipped up, and it came crashing toward me instead. What a mess, huh?”

Casey forced a laugh, trying to act as if nothing was out of the ordinary.

But the cracks were obvious. Her words sounded rehearsed, her voice rushed, and her eyes never once met Monica’s.

She was lying.

“…That’s not true,” Monica said softly.

“It is. From the very first time we met, I hated you.”

The words pierced Monica’s chest. Normally, she might have lowered her head, fighting back tears.

But this time, something stronger than pain rose inside her—an undeniable sense of wrongness.

“What are you hiding, Casey?”

“Nothing. I hate you. So I tried to hurt you. That’s all.”

Here's the scene where it explains why she cut the ropes:

At last, Monica understood.

The reason Casey had knocked over the lumber in the eastern warehouse and staged an accident was to create an alibi.

If incidents occurred in two different places on the same day, most people would assume that both were the work of the same culprit targeting Felix’s life.

That way, by being a victim in one of the incidents, Casey could divert suspicion from herself.

Here's what I think about it:

So, Casey was lying about hating Monica. In the novel it is pretty obvious that Casey was lying for the sake of hiding something, as you can see on the second spoiler.

She tried to use Monica to get to know about Felix's schedule, and she did those things to Monica to gain her trust. But since Monica found out about the tea incident and the rope incident, Casey had to come up with a lie on the spot, for the sake of her alibi. It would be strange that she caused an incident on the same day the second prince was assassinated (if she succeeded), so I think she was trying to pretend to be like those noble girls that poisoned Monica, so she would have a reason to "hate" Monica. At the very least, she wouldn't be suspected of terrorism, since other people would think her target was Monica

It's also sad that they are cutting this rational side of Monica, where it explain all her thoughts and calculations, because on the novel it's shown that she if the situation demands it, she can shut out all emotion and react to any situation logically, stopping being that shy girl that she always is. This is pretty important to her development, because later on the story
(About this first spoiler, the manga still hasn't reached this part, so read at your own accord.)

there's a case she fails to shut out all of her emotions in the middle of a fight and letting the enemy escape because of this, since the enemy start threatening to kill her friends, and until now, she never had any people she cared about besides her late father, but now she's starting to care for her friends. It's basically showing that she's losing that machine side of her and becoming more human, and this is a good thing, but it also means that now she's got a weakness

This next spoiler is safe if you already read the chapter 26 of the manga:
I hope they at least doesn't cut out the part where Felix notices that someone summoned the spirit king on the school grounds and start suspecting that the Silent Witch is on his school, since the anime left out that scene where Felix find Nero carrying Cyril's body when he had that incident where his mana got out of control. Felix knowing Nero was on the school was one of the factors that made him sure that the Silent Witch was on the school, since later he gets to know that Nero is the Silent Witch's servant

I read the novel, but it was quite a while ago, so I don’t remember it perfectly. Still, the level of detail is exactly as you described—I’d even say it’s a bit more detailed than the manga. So it’s really just the anime that’s cutting out scenes, which is honestly pretty sad. Like the first comment on this thread said, on the anime there was no explanation of why she had to use Louis's barrier instead of trying other methods, but Monica's thoughts are pretty detailed on the novel

Here's the snippet of the LN that I had answered on that comment:

“Please… I’m begging you, Casey… stop the Spiralflame…!”

“No. Even if I were tortured, I would never stop the Spiralflame. Prince Felix’s assassination must be carried out to the end.”

(Should I use voice amplification magic to urge the entire student body to evacuate? …No, that won’t work. My words don’t carry enough weight; they won’t believe me. Should I use wind magic to blow only the Spiralflame into the sky? …No. The Spiralflame is a fixed-type magical device, so it’s probably anchored to the wall or floor. On top of that, it has the property of absorbing surrounding mana, so if I’m careless, it might explode the moment I try to activate my spell.)

In the end, the best option she can think of is to seal the Spiralflame inside a barrier and suppress its flames.

Monica is capable of using remote magic, so from here she can just barely manage to cast a barrier.

The problem is the barrier’s strength. The Spiralflame has enough destructive power to pierce through most barriers.

(If I pour all of my mana into it, I can weaken the Spiralflame’s power… but that’s not enough. Unless I completely suppress it, it’ll ignite the fireworks and cause a catastrophe. The barrier needs to be as strong as Mr. Louis’s…!)

The novel also explains very clearly that because the Spiralflame has the power to break through most magician's barriers, it's also called "Mage Killer", so even someone as powerful as Monica had to borrow Louis's barrier to be able to suppress it completely

Considering it was a terrorism attempt this time, maybe they`ll call someone worse than Isabelle

Here's the scene from the Light Novel:

“Please… I’m begging you, Casey… stop the Spiralflame…!”

“No. Even if I were tortured, I would never stop the Spiralflame. Prince Felix’s assassination must be carried out to the end.”

(Should I use voice amplification magic to urge the entire student body to evacuate? …No, that won’t work. My words don’t carry enough weight; they won’t believe me. Should I use wind magic to blow only the Spiralflame into the sky? …No. The Spiralflame is a fixed-type magical device, so it’s probably anchored to the wall or floor. On top of that, it has the property of absorbing surrounding mana, so if I’m careless, it might explode the moment I try to activate my spell.)

In the end, the best option she can think of is to seal the Spiralflame inside a barrier and suppress its flames.

Monica is capable of using remote magic, so from here she can just barely manage to cast a barrier.

The problem is the barrier’s strength. The Spiralflame has enough destructive power to pierce through most barriers.

(If I pour all of my mana into it, I can weaken the Spiralflame’s power… but that’s not enough. Unless I completely suppress it, it’ll ignite the fireworks and cause a catastrophe. The barrier needs to be as strong as Mr. Louis’s…!)

The novel also explains very clearly that because the Spiralflame has the power to break through most magician's barriers, it's also called "Mage Killer", so even someone as powerful as Monica had to borrow Louis's barrier to be able to suppress it completely

stand users attract other stand users

It seems like the anime is making a new route, since Miyako shouldn't have died when they become lovers on the VN, because she stops searching for the Evil Eye user all alone. I'm also sad we didn't have the scene where Empress tries to seduce Kakeru. It was an important factor to decide if Miyako and Kakeru become lovers, or if Miyako sees Kakeru's memories of Sophie explaining to him that she killed the fire user

But he and Bell had a similar strenght when they had that one-blow contest using the Argonaut skill. So if we combine it with level boost, maybe Bell would've dealt damage that time.

It seems the guild likes to favor Hestia Familia's enemies since they didn't do shit to help when the Apollo Familia attacked the Hestia Familia in the middle of the city, and this time they did everything they could to stop the Loki Familia from helping Hestia Familia. On the two cases, Apollo and Freiya were in the wrong, and the guild didn't do shit to help, so I wouldn't get my hopes up with the punishment if Freiya were to lose.

And there's also that thing that Freiya said about the three grand quests, so there's a possibility that the guild will use this as excuse to give her only a light punishment.

I thought the exact same thing, lol. If that shit wasn't dangerous, the enemy wouldn't be using it in the first place. Waiting for the enemy to finish chanting a spell is so dumb. The same thing happened with the healer of the Freiya Familia. They could have stopped her mid-spell, but they just waited her finish it and heal everyone. Besides, why the hell did they let Bell fight Ottarl without a Level Boost? That should have Haruhime's purpose on this war game, but instead she boosted everyone else but Bell.

The worst is that he was dumb enough to repeat the exact same mistake just some minutes later.

But his friends can see through the mask using anime logic