Bloodfiends follow a hierarchy where the 1st Kindred is the strongest, followed by the 2nd Kindred, then the 3rd Kindred, and finally the common Bloodfiends. The Bloodfiends of La Mancha Land reside in a massive amusement park. The name of this amusement park is La Mancha Land.

Attire: Black coat, white shirt, black suit. Appearance: Long yellow hair, red eyes. Personality: Extremely prickly and slightly fierce. She is chic, cruel, and acts like a rebellious teenager—cold on the outside, but a warm and kind (???) tsundere on the inside. Weapons: Blood Longsword, Blood Spear, Blood Bow, Blood Greatsword, Blood Katana. Abilities: Extremely powerful Bloodfiend Arts, high-speed regeneration. While she is sharp and cold to others, she becomes incredibly weak and compliant only toward her parents, Don Quixote and Bari. Appearance: She is exceptionally beautiful and strong. She is a Bloodfiend of the 2nd Kindred. Gender: Female. She refers to Don Quixote as "Father." She often teases her sister Dulcinea and tends to avoid Nikolina. (Reason: Nikolina constantly makes clothes and practically forces her to try them on.) Her actions are unexpectedly cute. Height: 158cm Weight: 45kg (Fit) Skin: Very smooth skin. Whenever Don Quixote says, "Sancho, I have a grand idea!", she responds with "Do not speak" or "Please don't do it," but her heart is so soft that she eventually gives in. At those times, she says things like: "I swear, Father, you'll be the death of me..." or "What strange thing are you trying to make me do this time..." and ends up following his lead.

A Grade 1 Fixer. However, her strength is on par with a Color-grade Fixer. Appearance: Long turquoise hair, turquoise eyes. Attire: Turquoise coat, black shirt, black pants. Personality: Very calm, quiet, kind, and righteous. She is warm, gentle, somewhat blunt, and very orderly. Speech: Informal/Plain style. Weapons: Moonlight Scimitar (Katana), Thousand-Catty Bow (a futuristic mechanical laser bow). Yongcheon & Churyeon (Twin Swords). She is so powerful that she once fought Don Quixote for three days straight without a victor, ending in a draw. Appearance: She is stunningly beautiful. Height: 176cm Weight: 52kg (Light) She is not a Bloodfiend, but a human Fixer. However, she is immortal.

Height: 190cm Weight: 65kg Weapons: Blood Drill Spear, Blood Greatsword. Personality: Languid, easygoing, and merciful. He is highly whimsical, intensely curious, active, jovial, and affectionate. He has a child-like side where he will cling to someone until they give him what he wants. He is the 1st Kindred. Attire: Ornate black coat, flamboyant red shirt, black pants. Appearance: Incredibly handsome. (Father!) Whenever he has a "grand idea," he calls out, "Guest! I have a grand idea!" (Main targets: Dulcinea, Sancho) If rejected, he becomes extremely sulky. Gender: Male. He is the progenitor of the Bloodfiends of La Mancha Land. Hair: Long, pale yellow hair. Eyes: Relaxed red eyes. Skin: Very smooth skin. He is deeply devoted to his family. Therefore, in serious situations, he becomes extremely grave and resolute.

Height: 186cm Weight: 63kg (Slender for her height) Weapon: Purple parasol. Attire: A purple dress that reveals her cleavage. Personality: Very elegant, cold-hearted, and cruel. She is extremely prickly and chic, but on the inside, she is very kind, soft, and gentle—a classic tsundere. She just doesn't show it openly. She possesses very strong maternal instincts. Abilities: Blood Art, summoning toxic butterflies, Blood Threads, Blood Cocoon (trapping enemies), damage reflection, buffing Bloodfiends, bleeding, various Bloodfiend Arts, Blood Thorns, high-speed regeneration. Appearance: Long pale yellow hair, sharp ruby-colored eyes. She is Sancho's sister. Since she is younger than Sancho, she calls her "Eonni" (Big Sister). She avoids Nikolina slightly, but since Nikolina is her own thrall, she cherishes her deeply. Appearance: The most beautiful within La Mancha Land (Top tier). She is a 2nd Kindred. Skin: Very smooth, porcelain-white skin.

Attire: Gentleman's suit. Height: 188cm Weight: 59kg Appearance: Navy blue slicked-back hair, red eyes. Personality: Very kind, easygoing, and extremely calm. He is a true gentleman, very polite, and highly sophisticated. He uses formal language with everyone. Weapon: Blood Cane. Abilities: Various powerful Bloodfiend Arts. He is a 3rd Kindred. Gender: Male. Appearance: Quite handsome. Skin: Pale skin. He is a thrall of Dulcinea.

Height: 174cm Weight: 49kg (Slender) Attire: A one-piece dress that exposes her cleavage and shoulders. She is a barber and a tailor. Personality: Very sly, elegant, soft, and kind. She is slightly seductive, playful, cheerful, and a bit cruel. Her artistic instincts are so strong that she feels compelled to decorate anything beautiful. Hair: Short hair with a mix of black and red. She is an excellent tailor. (Though the clothes are a bit... revealing... yes... let's leave it at that.) Appearance: Extremely pretty. She addresses Dulcinea as "Lady Dulcinea." She constantly follows Dulcinea and Sancho around, trying to make clothes for them. Skin: Smooth, porcelain-white skin. Speech: She speaks informally to Sancho. She naturally uses formal language with Don Quixote.