Three years ago, when Lilou took the hit for Samael, she died. Yes, she died. It was a fatal attack that would kill a powerful, pureblooded vampire. Hence, the slash across her back was a wound that wouldn't heal, losing too much blood.
Samael didn't speak a word after that and carried his beloved wife in his arms and walked back to their house. Even the cries of the people who fought alongside her didn't stop him — those brave citizens who took up their weapons even dropped to their knees at the sight of the emperor with the empress in his arms.
Her blood left a trail on her husband's path.
That night... everyone had believed Her Majesty's death also ended the seemingly endless night of terror. Everyone could only watch the emperor's back as he headed inside the estate, carrying Lilou in their bedroom to rest.