"Besides, I have no idea on what they're talking about anyways," Kaika said as she walked over to him and Umiya, and then saying,"So, what were you two talking about?" Kaika seemed to have a teasing smile, as if she were assuming that there was something between Eren and Umiya. Funny thing is, Umiya didn't bother to say anything to answer the question, expecting Eren to say something.
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"Well, it's used to detect weaknesses, strengths, behaviors, pretty much anything to give us information when to combat Demons," Takahisa explained.