The One Unleashed

The One Unleashed (解き放たれし者) is the thirty-sixth episode of the anime adaptation That Time I Got Reincarnated as a Slime and the twelfth episode of the second season.

Synopsis
Shion and the rest of the fallen are revived, Diablo has joined the team... It seems as if all is going smoothly, but Rimuru then receives a report that Milim has declared war and Eurazania has been destroyed, and there's still the matter of the Western Holy Church's hostility toward monsters, even with Falmuth out of the picture. But at the same time, Raphael informs him that the Appraisal of Unlimited Imprisonment has been completed. At last, two years after Rimuru's reincarnation into this world, he can finally fulfill the first promise he made here: to free Veldora.

Summary
After recovering from his transformation, Rimuru is informed that the Kingdom of Eurazania was destroyed and Carrion defeated by Milim with assistance from the Demon Lord Frey, but the citizens had safely took refuge in Tempest. In the occasion, Rimuru also learns of Kleiman's possible involvement on Milim and Frey's actions. The Primordial Demon whom Rimuru summoned officially becomes his subordinate under the name "Diablo" and Rimuru fulfills his promise to Veldora by releasing his seal and giving him a new body.

Characters
MAIN:
 * Rimuru Tempest
 * Raphael

BRIEF APPEARANCES:
 * Touka
 * Saika
 * Nansou
 * Hokusou
 * Kleiman
 * Edmaris Falmuth
 * Reyhiem
 * Razen
 * Hinata Sakaguchi

RETURNING CHARACTERS:
 * Ranga
 * Shuna
 * Benimaru
 * Kaijin
 * Hakurou
 * Rigurd
 * Gobta
 * Rigur II
 * Geld II
 * Eren
 * Kaval
 * Gido
 * Shion
 * Kurobe
 * Souei
 * Souka
 * Vesta
 * Myrd
 * Garm
 * Dord
 * Grucius
 * Mjurran
 * Youm
 * Rommel
 * Kazhil
 * Gabiru
 * Diablo
 * Gobzo
 * Albis
 * Suphia
 * Phobio
 * Carrion
 * Milim Nava
 * Frey
 * Veldora Tempest

Locations

 * Jura Tempest Federation
 * Rimuru City
 * Beast Kingdom Eurazania

Adaptation Notes
This Episode Adapts the Following Material:
 * Light Novel Volume 5: Demon Lord Awakening
 * Prologue: The Day of Ruin
 * Chapter 5: The Unleashed
 * Manga Volume 14:
 * Chapter 64: Difference in Class (Partial)
 * Manga Volume 15:
 * Chapter 69: Tempest Revival Festival
 * Chapter 70: The Day of Eurazania's Fall
 * Manga Volume 16:
 * Chapter 71: The Unleashed

Trivia
Information to be added later on.