This was... the Mother Tree of Desire!
In the vision Mr. Fool sent Angel in response to her prayer, she immediately recognized the source of that crimson aura.
It was the light emitted by the scarlet planet she had seen on Oravi Island after blocking a certain "external" power while dealing with the admiral's mutated mistress, Cynthia, alongside Klein.
Compared with the similarly colored blood moon, it was even more strangely alluring, seemingly filled with countless desires. A single glance brought all manner of bizarre, sensual thoughts into her mind. Even though Angel had already passed through a certain stage of being a Demoness, she still felt somewhat unsettled.
Fortunately, a layer of gray fog separated her from that eerie vision, allowing her to quickly shake off the power of desire.
Praise Mr. Fool... Angel offered her heartfelt thanks to that existence, but confusion and uncertainty soon filled her mind. How was I supposed to deal with the power attached to my body... or, more precisely, my spirit body?
There was no doubt that during the battle just now, the Mother Tree of Desire behind Abomination Suah had used Angel's brief contact with the Abomination's Black Giant Hand to secretly attach this power to her spirit body.
The reason for not choosing her physical body might have been a concern that Anne, who was nearby, would notice something amiss. As a Balancer, she was extremely sensitive to any "imbalance" in objects around her. She should have been able to detect the anomaly in Angel and purify it with her own power, or at least offer a warning.
Contamination of the spirit body, however, would probably remain undetected for quite some time, until...
*This was just like the Naturism Sect's plot against Admiral Amyrius on Oravi Island. Afterward, Klein deduced that