That Time I Got Reincarnated as a Slime (2018)

S2E4 The Scheming Kingdom of Falmuth

Tempest is bustling with excitement as preparations are underway for a grand feast to welcome Rimuru back home. Amidst the festivities, Myulan, a new majin, arrives under the orders of Demon Lord Clayman. She has joined Youm's crew as their military advisor to gain entry into Tempest. Upon her arrival, she is taken aback by the strength of the nation but continues to engage with its inhabitants to gather more information. Meanwhile, the king of Falmuth views Tempest as a threat and collaborates with the Western Holy Church to hatch a scheme for invading the monster nation.