Event Scenario/Enemy From the Otherworld

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Taimanin! Mist Train Defense Operations
T-1	Meeting the Independent Rangers
T-2	Similarities With the Special Steel Squad
T-3	Enemy From the Otherworld
T-4	Looking for Clues
T-5	The Evil Eye User's Goal
T-6	Attrition Warfare
T-7	Showdown in the Tundra
T-8	The True Goal
T-9	The Strongest Taimanin Has Arrived!
T-10	Comrades-in-arms

Kuroki Shizuku―― Kuroki Shizuku is a Taimanin with whom Kotaro and his team have fought in the course of their mission.
The fact that Yukikaze has engaged him in battle in this world means that Shizuku Kuroki, like Kotaro's team, is still hiding somewhere in Iris Cloud.
Yukikaze	"I hope he's just hiding..."
Hebiko	"That can't be true. He might be up to something... Perhaps even hurting people in this world...!"
Kotaro	"This is not good... Conductor-san, I'll give you some information about Kuroki and request you to gather the same information as our friends."
Conductor	Of course. If a dangerous individual is in our midst, we must also respond.
Paddington	"Yes, Sir Conductor. I'll make arrangements as soon as we return. This is a big matter..."
Yakutsk	"If that's how it is, we can't just relax and go sightseeing in Nishiki. Let's hurry back."
After thanking the border officer in charge of Nishiki's borders and leaving, we headed straight for the train.
However, just when Yukikaze saw the Mist Train and was about to let out a cry of admiration――
Paddington	"HAWA, W-What was that, what's that shock!?"
Yakutsk	"......! That's."
Shizuku	"You've shown up as expected, blind head of the clan."
Yukikaze	"Dammit, Kuroki Shizuku...!!"
Conductor	I see, so that's the person Kotaro's team were in conflict with. That presence certainly foretold danger.
Shizuku	"You said something interesting about defeating me, didn't you? Just as well, I'll show you how much I'm worth."
Kuroki swung wide and assaulted Yukikaze. She dodges the attack with her own impressive acrobatics, however――
Yakutsk	"Wha...!? He just destroyed a stone building like it was a toy. Seeing that, that means he can pull off incredibly powerful attacks."
Hebiko	"Hebiko's here! HAAAAH!"
Paddington	"Hebiko has turned into an octopus! She's in battle mode!"
Paddington was cheering for Hebiko, while I was just calmly observing the progress of the battle.
Yakutsk	"I'll join in the fight too. Fine with you, Conductor?"
Conductor	That's the only way. Please.
Yakutsk	"Even Conductor you have noticed. This situation is pretty bad."
Yakutsk	"All of them was sent to this world 'during a battle' with that guy ―― Not during movement, but during a battle. In other words, there is a high possibility that it was a disadvantageous development.
Yakutsk	"There are two more of them who haven't been able to unite with them. On the other hand, Paddington and Conductor can't be counted as combatants..."
Conductor	Correct. The current situation is that, by simple arithmetic, they must be short of strength. Therefore, I suspect that we are in a pinch.
Yakutsk	"If I had the strength of both of them, the calculation would work out... However looking at Hebiko's team, it seems like they're a bit at their limits..."
Yakutsk looked solemn, but readjusted her whip and charged at Kuroki.
Kotaro	"Hebiko, spit some ink at him before he disappears!"
Hebiko	"Mhm, got it, Fuuma-chan!"
In response to Kotaro's command, Hebiko sprayed ink at Kuroki. However, he quickly dodged and the ink stained the building behind him.
Paddington	"T-that's amazing! Miss Hebiko, not just your legs, but your ink as well...!?"
Shizuku	"How unbelievably horrible of you, you're trying to cover me with that filthy juice."
Hebiko	"It-it's not filthy!"
Shizuku	"So in order to punish bad kids... TAKE THIS!"
Hebiko	"UWA WAAAAH!"
Paddington	"Hebiko! T-Thank goodness, you were able to avoid that."
Hebiko	"I already told you it's not filthy!"
Shizuku	I guess I'll just get filthier if we fight each other any further. Fine then, blind head of the clan. I'll leave that head of yours intact for a while longer."
Kotaro	"What the...?"
After a one-sided dismissal, Kuroki turned his back on us, leapt over the collapsed building with surprising speed, and left the scene.
Kotaro	"......?"
Yukikaze	"Looks like he really got away. What was that all about?"
Yakutsk	"Just... Honestly, that could have saved us."
Yakutsk looked around. Many buildings had collapsed and were in a disastrous state.
Hebiko	"Terrible.. The town's like this..."
Yakutsk	"Let us do what we can. Let the Nishiki Army take care of the rest and we'll go back to headquarters."
It was heartbreaking, but we decided that it was the only way to fulfill our role and we headed for the Mist Train.
Yukikaze	"The Nisha family, where that guy's from, used to be the major group that supported the Fuuma clan. However, the head of the family, Nisha Gaiza, rebelled against them..."
Yakutsk	"I see. So that's how it happened."
It's the day after we safely returned to St. Iris. After I have just finished arranging a request for information on Shizuku Kuroki, I talked to Kotaro's team again.
Hebiko	"Blind head of the clan, that refers to Fuuma-chan. He calls him that because he doesn't like him."
Kotaro	"I think he's up to something, but if I don't know what his purpose is, I can't tell what he's going to do..."
Paddington	"B-Big news! We have new intelligence!"
Yukikaze	"Rinko-senpai? Or is it...?
Paddington	"Flamarine just reported in. There are several residents who have seen the sea frozen over."
Hebiko	"It's Kirara-senpai! Let's go get her right away."

Taimanin! Mist Train Defense Operations
T-1	Meeting the Independent Rangers
T-2	Similarities With the Special Steel Squad
T-3	Enemy From the Otherworld
T-4	Looking for Clues
T-5	The Evil Eye User's Goal
T-6	Attrition Warfare
T-7	Showdown in the Tundra
T-8	The True Goal
T-9	The Strongest Taimanin Has Arrived!
T-10	Comrades-in-arms