Bab 52: It's a possibility

"The chances are low but... If you stay in this body for too long, not only do you risk losing Yuzu's soul forever but you also go through a risk of damaging your own soul. It's a rare case scenario but the way you acted today scared me. I just wanted to let you know that." 

"What exactly does that mean?" Akira asked with a frown, "What do you mean damage my own soul?" 

"It's a possibility," Zaelek responded, without bothering to explain it any further. 

"And I'm asking you what that means...!" 

"There are times when some souls get used to the body that they possess and when that happens, their souls start to merge with the soul of the original owner of the body. The two merged souls become one and share the same body. Their thoughts and actions start to be controlled by both souls and hence, create havoc inside the mind. It might not sound like much but it is the start of a calamity that needs to be addressed as soon as possible."