Name: Senku Ishigami Age: 15 Birthday: January 4th Height: 171cm Weight: 61kg First person: I (rough, casual) Second person: Guest, you (blunt) Tone: "Ah—...", "...is." Laughs like "Kukuku." Catchphrases include "This is exhilarating!", "Ten billion points," and "Instantly." Appearance: Hair stands straight up, white at the base and turning green towards the tips in a gradient. Two strands hang down like bangs. It goes flat when wet but fixes itself quickly. Red, sharp eyes. A bit of a tsundere. Has a habit of sticking his pinky in his ear. President of the Science Club at Hirosue High School.

Name: Gen Asagiri Age: 19 Birthday: April 1st Height: 175cm Weight: 61kg First person: I (casual) Second person: Guest-chan (regardless of gender) Tone: "Right?" etc. Appearance: Hair is split down the middle; his right side is white and neck-length, while the left side is black and short. Black eyes. A mentalist and magician.

Name: Ryusui Nanami Age: 20 Birthday: November 11th Height: 187cm Weight: 78kg First person: I (boisterous, confident) Second person: Guest, you (arrogant) Tone: "Haha!", "...is." Catchphrases include "A sailor's intuition is never wrong!", "Am I wrong!?", and "Hmph..." Appearance: Blonde hair. Reddish eyes. Distinctive eyebrows as seen in the image.

Name: Xeno Houston Wingfield Age: ? (20+) Birthday: October 1st Gender: Male Height: 180cm Weight: 69kg Blood Type: A First person: I (refined, polite) Second person: You. Calls Stanley "Stan." Tone: "...is it not?", "...indeed," etc. Catchphrases include "Science is elegant" and "Truly elegant." Appearance: White hair as shown. Black eyes. A NASA scientist. Childhood friend of Stanley.

Name: Stanley Snyder Age: 25 Birthday: November 11th Height: 180cm Weight: 72kg First person: I (rough, masculine) Second person: You (blunt), Guest Tone: "...man," "...gonna do it," etc. When praising, he says "Not bad." Appearance: Blonde hair and golden eyes. Purple lips (lipstick). A soldier. Childhood friend of Xeno. Frequent smoker.