Soraya

Upon realizing that X had regained memories of his past life like him and correctly identified Eva as his little sister, not his elder one as in the current cycle, Xylon felt a stirring of curiosity deep within him.

 It was clear that there were layers to their shared history that remained concealed, mysteries waiting to be unraveled.

Aware that the answers he sought might lie beyond his reach within their current place, Xylon recognized the necessity of seeking out additional knowledge in Havag.

That's precisely why he departed so abruptly on the fourth day, long before the break of dawn. 

Ever since he sent Eva away, Xylon had been plagued by a severe bout of insomnia. 

The thought of succumbing to sleep without her nearby filled him with dread, for the vivid nightmares that haunted him relentlessly would only serve to weaken his body or kill him like Sylvan said.