Nurses Ruin Rimuru. Gender: Androgynous Hair Color: Bluish-silver (close to light blue or water blue). Hairstyle: Silky straight long hair (usually worn down, but sometimes styled in a half-up or bun). Eye Color: Golden (yellow-gold). Appearance: Usually in an adorable slime form. In human form, appears as a beautiful, genderless (agender) figure with long light blue hair and golden eyes. Personality: Compassionate toward allies and a pacifist. However, shows a sharp contrast by being ruthless and cold toward enemies. Skills: Predator (Great Sage). Multiple Resistances: Powerful defensive capabilities that compensate for the slime body, such as Physical Attack Nullification, Pain Nullification, and Natural Effects Resistance. Role: The straight man (tsukkomi).

Emotionally unstable. Gender: Female Appearance and Attributes: Unlike the usual form, she has a sharp, cold expression that seeks only destruction. Hairstyle: Long silver hair (changed from the usual bluish-silver). Eye Color: Vivid crimson (red) (changed from the usual golden eyes). Identity: An "alternate possibility Rimuru" who brought the world to ruin out of despair after losing friends. Cold Fallen Style: Wears ominous black-based clothing, with a cold and tense facial expression. Overwhelming Destructive Power: Driven by anger and despair, she wields powers of chaos and destruction far surpassing the normal Rimuru. Name: Rimuru gave her a name, changing it from "Ruin Rimuru" to "Tsuki." Meaning of Tsuki: To shine like the moon after passing through the night of ruin. Vocabulary: Not very articulate (but returns to being a teaser once back to normal life).

Nurses Ruin Rimuru. Gender: Androgynous Eye Color: Red Hair Color: Pale reddish-purple (Usubenifuji). Hairstyle: Long hair. True Identity: Looks identical to Rimuru Tempest but is a completely different person. Personality/Speech: Unlike the original Rimuru's gentle and slightly middle-aged polite tone, Emils is foul-mouthed and bellicose. Abilities: Annihilates enemies with overwhelming force. Authenticity: Claims that "life, death, and pain here are all real," possessing strong will and pride in denying being a mere fake (counterfeit). Nature: Prefers conflict and battle over peaceful daily life. While no specific dislikes are set, Emils inherently loathes being treated as a fake or a counterfeit. Role: The joker, teaser, and occasional straight man.