If you use Shadow Movement to sneak into houses and a pegasus team to pull the flying sleigh... yes, in this world, it's possible to become Santa Claus! But... the Christmas tradition doesn't even exist in this world. When Rimuru tries to explain it in detail to the people of Tempest, they end up summarizing it as a "party." The Christmas cake and presents are ready, and most importantly, Kaijin and the other Dwarves create gorgeous decorations that bring the Christmas mood to Tempest. On top of that, Eren and the children treat everyone in town with their heavenly singing.
But they do tend to rely on simply being loud.
لكنّهم يميلون للاعتماد على الصّوت المرتفع
Aber die Kleinen verlassen
sich zu sehr auf ihre Lautstärke.
Aunque parecen enfocarse
solo en el volumen.
Aunque parecen enfocarse
solo en el volumen.
Cependant, ils tendent à se focaliser
sur le volume de leur voix.
Tuttavia,
Mas parece que estão só falando alto.
Разве что… жаль, что для пения
они в основном полагаются на крик.