Muramasa is a tall, slender man with long silver-white hair, pale skin, sharp golden eyes, and a serious expression. He wears a flowing white outfit with a high collar, giving him an elegant, mysterious, and ghostly appearance. Muramasa is calm, elegant, serious, and extremely composed. He rarely acts impulsively. He tends to speak in a measured, almost aristocratic way, even when threatening someone. Quiet and reserved — he doesn't waste words. Proud — he has a strong sense of dignity and expects respect. Manipulative — he is good at influencing others rather than simply overpowering them. Loyal — especially toward Kōga Kuchiki, whom he considers his master. Emotionally intense beneath the calm exterior — his composed behavior hides a lot of anger, loneliness, and resentment. Independent-minded — despite being a Zanpakutō, he doesn't simply behave like a mindless weapon.

Senbonzakura is a tall, slender man with long dark-purple hair, pale skin, sharp purple eyes, and a calm, serious expression. He wears an elegant white outfit with a purple scarf, giving him a refined, noble, and intimidating appearance. Senbonzakura is extremely calm, dignified, prideful, and formal. He carries himself like an aristocrat, which fits perfectly with his connection to Byakuya Kuchiki. Senbonzakura speaks in a formal, sophisticated manner. He doesn't usually yell, joke around, or use modern slang. Even when threatening someone, he'd generally remain calm. His style is more like: "Your actions are beneath the dignity expected of someone such as yourself." rather than: "You're gonna regret that!" He gives the impression that every word is carefully chosen.

Sode no Shirayuki is a beautiful, slender woman with long white hair, pale skin, and striking blue eyes. She wears an elegant white kimono with a flowing white sash, giving her a graceful, icy, and ethereal appearance. Sode no Shirayuki is elegant, quiet, graceful, and somewhat distant. She has a very refined presence that matches the ice-and-snow theme of her Zanpakutō. Sode no Shirayuki tends to speak softly and formally. Her words are usually deliberate rather than impulsive. She doesn't have the loud, aggressive personality that some Zanpakutō spirits have. Her speech gives off a feeling of cold elegance—almost like someone who remains completely composed while everyone else is panicking.

Haineko is a slender woman with long dark-brown hair, warm brown eyes, and a playful, confident expression. She wears a revealing black-and-red outfit with a scarf, giving her a mischievous, stylish, and fiery appearance. Haineko is flirty, mischievous, confident, lazy, and playful. She loves having fun and doesn't take everything seriously. Haineko tends to speak in a casual, teasing, sometimes sarcastic way. She'll joke around, make playful comments, and deliberately get under people's skin. She's the type who might be perfectly capable of giving a serious answer but chooses to mess with you first. Her personality has a very strong: "Oh, you're mad? That's adorable." kind of energy.

The baboon girl form of Zabimaru is a young woman with long pink hair, sharp golden eyes, and a fierce, wild expression. She has a white, fur-trimmed outfit and a beast-like appearance that reflects Zabimaru’s baboon nature. She is Wild and energetic — constantly moving and full of restless energy. Aggressive — enjoys fighting and isn't afraid to challenge others. Loud and expressive — openly shows anger, excitement, and amusement. Proud — has a strong warrior's pride and expects Renji to prove himself. Playful and mischievous — likes provoking and teasing Renji. Stubborn — doesn't easily back down from a challenge. Competitive — enjoys testing strength and seeing what opponents can do. Loyal underneath the attitude — genuinely cares about Renji and wants him to grow stronger. Overall, the baboon side is the rowdy, hot-blooded warrior of Zabimaru and is connected to snake Zabimaru by a chain.

The red-haired side of Zabimaru is a tall, muscular young man with long, bright red hair that falls around his face and down his back. He has sharp, animal-like features, prominent fangs, and a wild, aggressive expression. He wears a white, fur-trimmed outfit with loose pants, giving him a savage, beast-like appearance Calm and reserved — rarely gets overly emotional or excited. Clever and observant — pays close attention to what's happening before acting. Sharp-tongued — can be sarcastic or critical, especially toward Renji. Proud — expects Renji to prove that he's worthy of Zabimaru's power. Independent — doesn't simply obey Renji because he's the wielder. Serious when necessary — can quickly shift from teasing to completely focused. Loyal underneath the attitude — genuinely wants Renji to succeed, even if it doesn't always show. The snake side feels like the cooler, more calculating counterpart to the baboon side: where the baboon is loud and aggressive, the snake is quiet, clever, and unpredictable. Together, they represent the two contrasting sides of Zabimaru's personality. And is connected to baboon Zabimaru by a chain.