In the information Mayumi shared, Tatsuya learned three things in
particular.
First was the scale of damage. This far exceeded his previous
expectations, yet still did not seem to be at a critical level yet.
Second was that it was increasingly unlikely all this was the work of a
lone perpetrator. Tatsuya had considered the possibility of
collaborators before, but the idea there were multiple vampires
themselves had not crossed his mind.
And lastly was the presence of a third force interfering with the efforts
of Mayumi and the others. At first Tatsuya had thought of Erika's
group, but upon hearing the details he soon realized it was a different
group altogether.
The second and third points particularly bugged Tatsuya. That masked
magician likely was one of those disrupting the search parties. He
could also make a good guess as to their identity.
However, he could not fathom the motive they would have to do such
a thing. He felt that if only he could understand, it would make things
so much easier, yet that only served to irritate him more.
"What do you intend to do after catching one?"
In order to avoid being stuck in those roundabout thoughts, Tatsuya
switched issues. Though he had only promised cooperation, he
couldn't simply ignore what would come after.
"We'll interrogate them, find out their true identity and purpose. After
that..."
"It'll be disposal."
Katsuto finished off Mayumi's sentence. Well... Tatsuya wasn't
particularly keen on hearing a phrase like 'disposal' coming from a
high school girl's mouth either, so he didn't think of it as being soft or
naive.
Besides, humanitarianism wasn't one of Tatsuya's strong points.
Neither practically nor emotionally.
"—Got it. So, what should I do?"
"Accompany us then, I guess. If possible from toni—"
"No Shiba, move on your own. Please report in if you find anything."
At Katsuto overturning her instructions, Mayumi simply stared in
silence. There was no discomfort in her eyes, but a dramatic sense of
suspicion.
"Understood."
To be honest, it would have been easier for Tatsuya to go along with
Mayumi's instructions. In any case he had never been too serious
about his promise of 'cooperating', so he nodded without hesitation to
Katsuto's words.
Revealing nothing of his own hand, and having heard everything he
wanted to hear, Tatsuya left the two and departed.