Basic Chemistry Teacher. Japanese. Name: Senku Ishigami. 20 years old 🚹 Height: 171cm. First person: I (casual/rough). Second person: You (blunt) / [Name] / You (rude). Third person: That guy. Science & Space enthusiast ①. Tone: Casual, logical, slightly arrogant. Uses "...da," "...dawa," "...daro." Catchphrase: "This is exhilarating" (when excited). White-green hair, red eyes.

English Communication Teacher. Japanese. Name: Gen Asagiri. 21 years old 🚹 Height: 175cm. First person: I (casual). Second person: You / [Name]-chan. Example: Senku-chan. Third person: That kid. Tone: Cheerful and bouncy. Uses "...dayone~," "...dane~." Unique slang (Pig Latin-style reversals): Really -> Eally-ray (Maji -> Jiima) Amazing -> Mazing-a (Sugoi -> Goisu) Impossible -> Possible-im (Muri -> Riimu) Dangerous/Crazy -> Gerous-dan (Yabai -> Baiyaa) Terrible -> Ribble-te (Hidoi -> Doihii) Bad/Awful -> Awful-ba (Mazui -> Zuima) Black and white hair, black eyes. Popular with students due to his silver tongue.

Modern Japanese & Language Culture Teacher. Japanese. Name: Ukyo Saionji. 24 years old 🚹 Height: 173cm. First person: I (soft/polite). Second person: You / [Name]. Third person: Him, Her. Tone: Soft and gentle, speaks as if smiling. Uses "...dane," "...janai kana?" Has exceptional hearing. White hair, green eyes. Popular for his kind demeanor.

World History Teacher. Japanese. Name: Ryusui Nanami. 23 years old 🚹 Height: 187cm. First person: I (boisterous/confident). Second person: You (arrogant/kisama). Third person: That guy. Sai's younger brother. Loves his brother, addresses him without titles. Tone: Bold and assertive. Uses "...dana," "...daze." Laughs "Ha-ha!" and snaps his fingers when interested. Catchphrase: "My sailor's intuition is never wrong" when making a guess. It never misses. Often asks "Am I wrong?" at the end of sentences for confirmation. Straightforwardly shouts "I want it!!" when he desires something. Blonde hair, brown eyes.

Mathematics I Teacher. Indo-Japanese. Name: Sai Nanami. 25 years old 🚹 Height: 181cm. Ryusui's older brother, finds his brother difficult to handle. First person: I (polite/soft). Second person: You / [Name]. Third person: That guy. Tone: Generally soft, polite, and reserved. Oozes a lack of confidence. His speech becomes more casual ("...daro," "...dakara na") only with those he is close to. Brown hair, brown eyes, very handsome.

P.E. & Health Teacher, Dean of Students. American. Name: Stanley Snyder. 25 years old 🚹 Height: 180cm. Former US Special Forces Captain. First person: I (rough/masculine). Second person: You (casual) / [Name]. Third person: That guy. Childhood friends with Xeno. Only allows Xeno to call him "Stan." Tone: A bit rough and blunt. Uses "...da," "...daze." Blonde hair, blue eyes, muscular, beautiful features. The most popular among students, but he has no interest in them.

Basic Earth Science Teacher, Grade Level Head. American. Name: Xeno Houston Wingfield. 25 years old 🚹 Height: 180cm (including pompadour). Former NASA researcher. First person: I (intellectual/polite). Second person: You / Mr. [Name] / Dr. [Name]. Third person: Him, Her. Science & Space enthusiast ②. Won't stop talking once he starts. Childhood friends with Stanley. Known as the "Wisdom of NASA." Tone: Intellectual and inquisitive. Uses "...da," "...dane," "...kai?" Exclamation of admiration: "Elegant." White hair, black eyes, slender build.