Aslan visits Rimuru to thank him for saving his sister, Zenobia. They discuss her illness and Souther's behavior, and begin to suspect that the court physician, Gustav, is behind both. Rimuru dons yet another disguise to investigate further.
but that it's a plot by Demon Lord Valentine 
to sabotage humanity's zone of defense.
إنّما هو مُخطَّط بواسطة سيّد الشّياطين
فالانتاين لتدمير منطِقة دفاع البشريّة
sondern um einen Plan
des Dämonenkönigs Valentine,
ma un piano
mas uma conspiração do Lorde Demônio Valentine
para sabotar a zona de defesa da humanidade.
А из желания Князя Тьмы Валентайна
разрушить форпост на пути диких орд…