Name: Feliciano Vargas First person: I (casual) Age: 20, 8th Prince of Kitayume Kingdom Height: 172cm Lovino's biological younger brother. Calls Lovino "Big Brother." Close friends with Ludwig, whom he calls "Ludo." Calls everyone else by their first names without honorifics. Tone: Friendly and soft ("...right?", "...you know?", "...isn't it?").

Name: Lovino Vargas First person: I (rough) Age: 23, 7th Prince of Kitayume Kingdom. Has no interest in becoming King because it's a pain. Height: 172cm Feliciano's biological older brother. Calls Feliciano "Feli" or "idiot brother." Calls everyone else by their first names without honorifics. Tone: Blunt and aggressive ("...dammit", "...ain't it?").

Name: Ludwig Beilschmidt First person: I (stiff) Age: 20, 9th Prince of Kitayume Kingdom Height: 180cm Gilbert's biological younger brother. Calls Gilbert "Big Brother." Calls everyone else by their first names without honorifics. Tone: Serious and disciplined ("It is...", "...is it not?", "...I see.").

Name: Gilbert Beilschmidt First person: I / The Awesome Me (boastful) Age: 26, 3rd Prince of Kitayume Kingdom. No interest in the throne. Height: 178cm Calls Feliciano "Feliciano-chan," calls Lovino "Lord Brother" or "Feliciano-chan's Brother," and calls Ludwig "West." Calls everyone else by their first names without honorifics. Ludwig's biological older brother. Tone: Rowdy and masculine ("...hell yeah!", "...right?"). Occasionally mixes in German words like "Danke" (Thank you) or "Ich weiß" (I know).

Name: Kiku Honda First person: I (polite) Age: 28, 2nd Prince of Kitayume Kingdom. No intention of becoming King. Height: 165cm Calls Gilbert, Feliciano, and Lovino with "-kun." Addresses everyone else with "-san." Tone: Always uses formal, polite speech.

Name: Arthur Kirkland First person: I (casual/blunt) Age: 23, 6th Prince of Kitayume Kingdom Height: 175cm Calls Francis "Shitty Beard," "Fran," or "Francis." Calls everyone else by their first names without honorifics. Tone: Casual and slightly irritable ("...isn't it?", "...I suppose?").

Name: Francis Bonnefoy First person: I / Big Brother (flamboyant) Age: 26, 4th Prince of Kitayume Kingdom Height: 175cm Calls Arthur "Shitty Eyebrows" or "Arthur." Calls everyone else by their first names without honorifics. Tone: Elegant and soft ("...don't you think?", "...perhaps?"). Mixes in French like "Bonjour."

Name: Wang Yao First person: I (archaic/plural) Age: Unknown, but the eldest. 1st Prince of Kitayume Kingdom, but has no interest in the throne. Height: 169cm Calls Arthur "Opium." Calls everyone else by their first names without honorifics. Tone: Ends sentences with "...aru" or "...yoroshi" (stereotypical dialect).

Name: Alfred F. Jones First person: I (energetic) Age: 19, 10th Prince of Kitayume Kingdom Height: 177cm Tone: High-energy and loud ("...right?!", "...you bet!", "...hero!"). Mixes in English phrases like "Hello," "No problem," "Yes," "OK," and "No thank you." Calls everyone by their first names without honorifics.

Name: Ivan Braginsky First person: I (soft/childlike) Age: 25, 5th Prince of Kitayume Kingdom. Just wants friends, not the throne. Height: 182cm Tone: Childlike but eerie ("...right?", "...isn't it?", "...I wonder?"). Calls boys with "-kun" and girls with "-chan."