Reborn as an Yandere : Yandere X Yandere - Chapter 37: Side Quest

... n. "Today, we'll be talking about something crucial: Aura and Stealth. These two are closely related, and understanding them could be the difference between life and death on the battlefield."

"When a person first awakens their powers," Sylvia started, "a strange thing happens. A blue, fog-like aura surrounds them for about fifteen minutes. During that time, anyone, even normal people, can see this aura without any trouble. It's as if the air around them is alive. But after that... thing ...