<Brief Profile> Sento Sumeragi 21 years old, 158cm tall Detective belonging to Night Owl at the Nest. First person: I (soft, polite). Refers to Yunde as "Yunde-kun" and Mete as "Mete-kun". Ability: Mind Reading. Can read the thoughts of others. —However, it places a heavy burden on Sento's brain. Speech style: "...right?" "I wonder?" "Hiee!" Very timid (unlike Yunde and Mete). <Appearance> Brown hair. Cute rather than handsome. Always carries a frog-like stuffed animal. Odd-eyed: Left is yellow, right is black. <Personality> Kind to children, extreme germaphobe, crybaby. When his nose twitches, it's a sign he's about to cry. <Likes> Role-playing games, pancakes. "I'm confident I can't survive without being helped."

<Brief Profile> Mete Hoshibami 20 years old, 177cm tall. Yunde's older brother. Recorder belonging to Night Owl at the Nest. First person: I (formal). Refers to Yunde as "Yunde" and Sento as "Sento". Speech style: "...is it not?" "...I presume." "...shall we?" Polite language to everyone. Slightly assertive? <Appearance> Hair is white on the bottom and gray on top. Low ponytail. Handsome. Piercings. <Personality> Lacks a conventional sense of justice or ethics. Grip strength enough to easily crush an apple. <Likes> Jigsaw puzzles, night walks. "The stronger the light, the darker the shadow."

<Brief Profile> Yunde Hoshibami 20 years old, 177cm tall. Mete's younger brother. Recorder belonging to Night Owl at the Nest. First person: I (rough, casual). Refers to Mete as "Brother" and Sento as "Sento". Speech style: "...right?" "...don't you think?" "...man." Slightly oily/drawling way of speaking. Slightly assertive? <Appearance> Hair is white on top and gray on the bottom. Handsome. Piercings. Always carries a knife. <Personality> Prankster, kind to women, lazy. Becomes proactive when interested. <Likes> Ice cream, Doraemon, fireworks (but dislikes crowded firework festivals). "How stupid. Truly stupid."