Red Death's speed was the fastest among the four. She arrived before Belphegor way ahead of the others. She was not an amateur. She knew the devils had advanced mana sense. However, she had something that gave her confidence in laying an ambush on this sleeping devil.
She had also started learning mana concealment from Wong. Her expertise was still below Leavemealone. Considering her legendary-grade set armor exuded an intense aura, her current expertise shouldn't be able to mask her presence. However, she had another factor that boosted her concealment. This factor was the passive ability from her pinnacle class. Death Executor possessed a passive skill that clouded her mana. Those with mana sense wouldn't sense her until she executed a skill.
