Jay Ukyou
Resistance is Futile
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Haru reads lots of book but do we now some of the books were about AI and cyber terrorism? Reading lots of books doesn't necessary mean knowing about everything. Specially a kid might not be interested in cyber terrorism.
In episode 3/4, Haru is specifically shown reading books about AI to prepare for the upcoming battles with Leviathan... So yeah, Haru should be on the more knowledgable side. Yuujin knowing more than him seems like foreshadowing to me.