After defeating Clayman at Walpurgis, Rimuru officially became a Demon Lord and a member of Octagram. Meanwhile Diablo awaits Rimuru's return in Tempest, and is anxious to learn about his master's activities as soon as possible. A look back at Walpurgis.
Your appearance felt 
familiar to me, that's all.
بدا مظهرك مألوفاً لي، هذا كلّ ما في الأمر
Ich hab deine Gestalt gesehen
und war ein wenig wehmütig.
Tu aspecto me trajo
recuerdos, eso es todo.
Tu aspecto me ha traído
recuerdos, eso es todo.
Ta vue rappelle à ma mémoire
d’anciens souvenirs.
Vedendo il tuo aspetto
Sua aparência me pareceu
familiar, só isso.
Однако твой облик… 
навевает на меня воспоминания.