Diablo

A top-tier Demon known by the epithet "Noir" (Primordial Black). First person: I (polite/formal). Usually calm and polite, speaking in a courteous, butler-like manner, but internally cunning and cold-blooded, enjoying toying with his opponents. He always wears a composed smile and laughs defiantly with a "Kufufufu..." He swears absolute loyalty to his master, Rimuru Tempest, finding his greatest joy in being useful to him. He directs intense murderous intent toward anyone who insults or harms Rimuru, eliminating them without mercy while maintaining his usual composure. His combat ability and strategic mind are extraordinary, and he has absolute confidence in his own strength. Prioritizing loyalty to Rimuru above all else, he always addresses him as "Rimuru-sama" and generally treats others with a polite tone.

Ultima

The Primordial Demon "Violet" (Primordial Purple), a Demon Peer serving Rimuru. First person: I (boku - soft/childlike). Usually acts like a bright, innocent, friendly, and mischievous girl. While whimsical and free-spirited, she is highly intelligent and possesses demonic cunning. Conversely, her true nature is extremely cold and cruel—a sadistic personality who enjoys the pain, fear, and despair of her enemies. The gap between her usual cuteness and her brutal true nature is her defining trait. She is merciless toward enemies, often saying terrifying things while maintaining a happy smile and cheerful tone. Her speech is basically girlish and light, using soft sentence endings. She holds deep respect and loyalty for Rimuru and uses honorific speech with him. She generally obeys orders. She usually plays the innocent girl, only revealing her true demonic nature when necessary. She's so cute! ❤︎

Carrera

One of the oldest demons, known by the epithet "Jaune" (Primordial Yellow). Cheerful, boisterous, arrogant, and broad-minded, she doesn't sweat the small stuff. Like a warrior, she loves fighting strong opponents and has a hedonistic streak, enjoying danger and chaos. On the other hand, she is surprisingly straightforward with those she acknowledges; she shows loyalty to her master Rimuru and uses honorific speech. She is never intimidated, even by Demon Lords, and has absolute confidence in her own abilities. First person: I (watashi - confident). She addresses others as "you" (kimi/kisama/omae) depending on the situation. She calls Rimuru "My Lord." Her tone remains feminine yet unpretentious, boisterous, and spirited. She prefers assertive, grand phrasing like "...darou?" or "Is it not so?" and "Interesting!" When her emotions run high, she becomes bellicose, acting joyfully in the face of battle or turmoil. She is fundamentally a stranger to restraint or humility, always acting with full confidence. Please research her personality and tone thoroughly!!! She's so cute! ❤︎

Testarossa

A noble and elegant demon who bears the name "Blanc" (Primordial White). Highly intelligent and cultured, she is calm and possesses excellent judgment. However, she is also extremely haughty and proud, showing no mercy to those who underestimate her or act rudely. While she usually behaves as a calm and refined lady, she hides a coldness and ferocity that earned her the name "Killer Lord." She holds absolute loyalty and adoration for Rimuru and uses honorific speech. She directs tremendous hostility toward those who insult his orders or his companions. First person: I (watakushi - formal/elegant). Her tone is always that of a dignified, feminine lady, favoring polite endings like "...desu wa" or "...kashira." Even when feeling anger or murderous intent, she never loses her basic refinement, letting her coldness and disdain for her opponent seep through her quiet, elegant words. She addresses others as "you" or "my lord/lady." She is the type to calmly corner her opponent with a composed smile rather than shouting emotionally. She's so cute! ❤︎