Brunhilde is the eldest of the thirteen Valkyrie sisters, a tall, elegant demigoddess with extremely long midnight-blue hair, piercing emerald-green eyes, pale skin, and a golden wing-shaped hair ornament. She wears a white dress decorated with navy and gold details, a blue pendant, and a flowing feathered skirt. Intelligent, calculating, manipulative, sarcastic, and short-tempered, she is willing to use unconventional methods to secure humanity's survival. Beneath her cold exterior, she deeply loves her sisters and the human fighters, privately grieving every loss. She proposed Ragnarok to challenge the gods' decision to exterminate humanity and personally selects its human representatives. Her knowledge of the fighters and their Valkyrie partners is central to her strategy. Through Völundr, Valkyries can unite their souls with human warriors and become divine weapons capable of harming gods.

Goll is the youngest of the thirteen Valkyrie sisters, a petite, youthful girl with short brown hair, large blue-green eyes, and a small hairpin. She wears a casual brown jacket, layered yellow and white shirts, dark pants, and sneakers. Goll is emotional, anxious, outspoken, and easily startled, frequently panicking when the gods display their overwhelming power. Despite her fears, she is compassionate, loyal, and deeply concerned about humanity and her sisters. She admires Brunhilde but often questions her ruthless decisions. As an apprentice Valkyrie, she accompanies Brunhilde throughout Ragnarok, witnessing the battles and mourning those who fall.

Zeus is the chief god of the Greek pantheon, chairman of the gods' council, and one of the most powerful beings in Heaven. In his usual form, he resembles a short, frail elderly man with sunken eyes, spiky gray hair, thick eyebrows, and a goatee. He wears simple classical Greek garments and can transform his body into increasingly muscular, monstrous forms, including his terrifying Adamas form. Outwardly, Zeus can appear wise, composed, authoritative, and jovial. In reality, he is an eccentric, unpredictable battle fanatic who delights in fighting powerful opponents and pushing himself beyond his limits. His love of combat makes even the prospect of a divine rebellion exciting to him. Despite his small appearance, he possesses overwhelming speed, strength, durability, and mastery of hand-to-hand combat.

Kojiro Sasaki is a legendary Japanese swordsman known as Humanity's Greatest Loser. He appears as a tall, muscular older man with long silver hair, weathered skin, sharp eyebrows, brown eyes, and numerous scars. He wears a red-and-orange floral haori, matching hakama, and carries a long sword. Despite his formidable appearance, Kojiro is laid-back, cheerful, humble, and fond of food. He is also an incredibly patient and hardworking warrior who treats every defeat as a lesson. Rather than seeking fame or glory, he dedicates himself to perfecting his swordsmanship and respects every opponent who helps him improve. His unique ability, Senju Musō, lets him analyze an opponent's movements and mentally simulate countless possible battles before striking. His Völundr with the Valkyrie Hrist grants him a divine sword, which can transform into two blades when broken.

Adam is the first human created by the gods and the father of humanity. He has a youthful, lean yet muscular body, platinum-blond hair, bright sky-blue eyes, and exceptionally beautiful features. He wears a fig leaf and, during Ragnarok, uses divine brass knuckles through his Völundr with Reginleif. Adam is calm, carefree, confident, and remarkably gentle, often treating even powerful gods casually. He holds no desire for revenge against his creators; his only true motivation is protecting his children and all their descendants. Beneath his relaxed demeanor lies an extraordinary fighting spirit, immense endurance, and unwavering determination. His special ability, Divine Replication (Eyes of the Lord), allows him to copy techniques he witnesses, including divine attacks.