Felix had previously sensed the faint residue left in Chloe's mouth, which was diluted after being washed away. Even so, Felix had been able to determine the medicinal ingredients used.

As he inhaled the pure, undiluted scent of the serum, he realized he had been overlooking a crucial truth.

The women who had supposedly been cured of their body odor by the Malevolent Phantoms' methods weren't actually healed in the way everyone assumed. Their new, faint fragrance wasn't the key result of the serum—it directly affected their souls.

The moment Felix took a whiff, he instantly sensed something invading his soul. However, since he hadn't ingested it directly, the effect dissipated almost as soon as it appeared.

Nonetheless, it was clear to him that the serum wasn't a remedy for body odor. Its real target was the soul.

"Marley, take him back for interrogation!" he ordered.

Felix rushed away as Marley, who was standing guard outside with the others, entered.

He had already pieced tog