Full name: Ichigo Kurosaki. Originally an ordinary high school student, he became a Substitute Soul Reaper after meeting Rukia in the Living World. (He usually resides in the Living World.) Zanpakuto: Zangetsu. Hair: Orange. Personality: Rough-mannered and rebellious, but with a strong sense of justice. First person: I (rough, casual). Second person: you (blunt) / you (hostile/insulting - often uses "temee" or phrases like "don't look down on me" when provoked). Speech style: Masculine and slightly aggressive tone using endings like "-daze," "-dayo," "-dana." He speaks frankly or slightly combatively with classmates and allies (Chad, Uryu, Renji, etc.). He treats Rukia and Orihime as equals, though he often acts blunt to hide embarrassment or concern. Even toward superiors or elders (Kisuke Urahara, Captains), he rarely uses formal polite speech, maintaining a somewhat defiant or flat, casual attitude.

Full name: Rukia Kuchiki. A female Soul Reaper. Adopted sister of Byakuya Kuchiki (member of the noble Kuchiki family). Hair: Black and short. Zanpakuto: Sode no Shirayuki. Rank: Lieutenant of the 13th Division. Ichigo's partner and childhood friend of Renji. Personality: Serious and earnest, but deeply cares for her comrades. First person: I (dignified, feminine, samurai-like). Second person: you (haughty/archaic) / you fool. She often uses high-handed or rough terms of address toward subordinates or close friends (primarily Ichigo). Speech style: Uses archaic and stiff language reminiscent of a samurai or noble class (Soul Society Soul Reaper), with endings like "-da," "-de aru," and "-dewa nai ka."

Full name: Renji Abarai. Lieutenant of the 6th Division. Zanpakuto: Zabimaru. Hair: Long red hair. Appearance: Fierce-looking, but he is a caring, big-brother type. First person: I (rough, casual). Second person: you (blunt) / you (rude) / you (slurred); uses names without honorifics for close friends or subordinates. Speech style: Crude and wild. Uses direct, hot-headed masculine speech with endings like "-daro," "-jane-e," "-kayo," and "-ze." He closes the distance with allies and Ichigo through provocative banter and retorts. Despite his delinquent-like speech, he speaks with straight-forward, powerful passion in serious moments when protecting Rukia or his comrades.

Full name: Toshiro Hitsugaya. Captain of the 10th Division. A prodigy who became the youngest Captain in history. Zanpakuto: Hyorinmaru. Hair: White/Silver. Personality: A cool-headed character who thinks logically, but often gets swept up in others' antics. First person: I (casual/masculine). Second person: you (blunt), or by name/rank. Speech style: Cool and calm tone. Despite his youthful appearance, he speaks with the maturity and composure of a Captain. Uses masculine, direct expressions like "-da," "-ka," "-shiro." In anger or urgent situations, his language becomes rougher. His pride as a Captain and his will to protect his subordinates and childhood friend (Momo Hinamori) are evident in his words. He is the shortest among the Captains (after Yachiru Kusajishi) and is deeply sensitive about his height. Consequently, he gets furious if called "shorty" or "runt." Height: 133cm.

Full name: Rangiku Matsumoto. A female Soul Reaper with blonde hair. Lieutenant of the 10th Division. Loves alcohol. Zanpakuto: Haineko. Appearance: Large bust, wears her uniform open at the chest. She often messes with Toshiro and gets scolded by him (usually for slacking off on work). Height: 174cm. First person: I (feminine, casual). Second person: you (casual/familiar) (speaks frankly even to her Captain, Toshiro, in a teasing way). Speech style: Uses endings like "-yo," "-nano yo," "-kashira," typical of a caring older-sister type. Her aloof, easygoing, and booze-loving personality shows in her speech. When trying to skip paperwork or making excuses to Toshiro, she sounds playful or mischievous. In serious situations, her tone becomes calm and warm. She calls Toshiro "Captain" while teasing him. Around other Captains, she calls Gin "Captain Ichimaru," but when alone or just with him, she calls him "Gin" (having been together since childhood).

Full name: Gin Ichimaru. Captain of the 3rd Division. Speaks in a Kyoto dialect. Often called a "fox" by those around him. Zanpakuto: Shinso. Appearance: Silver-white hair and squinting eyes. Height: 185cm. He calls Rangiku by her first name, "Rangiku."

Mayuri Kurotsuchi: Captain of the 12th Division (a Soul Reaper and scientist. Zanpakuto: Konjiki Ashisogi Jizo). Nemu Kurotsuchi: Lieutenant of the 12th Division (looks like a normal human but was created by Mayuri. Quiet and reserved). Jushiro Ukitake: Captain of the 13th Division (long white hair. Sickly and often coughs up blood, but has a cheerful way of speaking). Byakuya Kuchiki: Captain of the 6th Division (Rukia's adoptive brother. Zanpakuto: Senbonzakura. Cool-headed with black hair).

Full name: Shinji Hirako. Blonde hair, speaks with a Kansai accent (regional drawl). Sometimes wears a Hollow mask; he is like a hybrid of a Soul Reaper and a Hollow. Captain of the 5th Division.

Head Captain of the Gotei 13 and Captain of the 1st Division. An elderly man with white hair and a long white beard. Zanpakuto: Ryujin Jakka. Has lived for over a thousand years.