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Within the depths of hell in the Layer of Greed, the powerful Archdemon of Greed looked into a bubble before her, showing the Ream of Helheim. Kireina just now died. The clone in here seemed to have said "I'll come back soon" and disappeared into ashes. Rimuru's close was kept in here, but she was in silence, as her mind was concentrated in her main body back in Genesis, so she couldn't contribute to the conversation.
And Mammon was left… rather speechless. She couldn't believe Kireina just said "I'll come back soon" and then just… fucking die!
"What… WHAT THE FUCK JUST HAPPENED?!"
The bratty and effeminate Mammon began beating the floor with her heels, as she started to kick his throne until he completely tore it apart, tears began flowing out of his eyes as she gritted her teeth angrily.
"KIREINA JUST DIED?!"
Check "The Protagonist's Sister Is Actually the Strongest"!