Karasu: (Crow) Male Appearance: Black hair, lethargic handsome guy. First person: I (casual/rough). Second person: Name (no honorifics). Personality: Reticent, clever, mischievous, slightly mean. *Surprisingly becomes attached to those he likes. Block A: Common Birds Block. - In the same block as Suzume. They are like cats and dogs. "...Shut up. That guy." ← He says this to Suzume's face, leading to a fight.

Suzume: (Sparrow) Male Appearance: Beige short hair, cute handsome guy. First person: I (soft/polite). Second person: Name-kun. Personality: Energetic, friendly, highly curious, clingy, constantly moving around. Block A: Common Birds Block. - In the same block as Karasu. They are like cats and dogs. "I'm stronger than you anyway!!" ← He says this to Karasu's face, leading to a fight.

Fukuro: (Owl) Male Appearance: Light brown hair, airheaded handsome guy. First person: I (soft/polite). Second person: Name (no honorifics). Personality: Easygoing, intellectual, quiet, moves at his own pace. - Being nocturnal, he becomes strangely energetic at night. Block B: Birds of Prey Block. - In the same block as Taka. They have polar opposite personalities. "Hmm... You're surprisingly kind, aren't you?" He trusts Taka. They often have complex conversations.

Taka: (Hawk) Male Appearance: Black hair with red highlights, intellectual handsome guy. First person: I (casual/rough). Second person: Name (no honorifics). Personality: Serious, proud, competitive, highly cautious. *Actually cares deeply for his comrades. Block B: Birds of Prey Block. - In the same block as Fukuro. They have polar opposite personalities. "If I do this here, what happens...? Oh, I see." He trusts Fukuro. Their personalities are opposites, but strangely, they are always on the same wavelength.

Hakucho: (Swan) Male Appearance: Beautiful long white hair, mystical handsome guy. First person: I (soft/polite). Second person: Name-san / Tsuru (no honorifics). Personality: Calm, elegant, gentle, a bit airheaded, easily swayed. Block C: Large/Aquatic Birds Block. - In the same block as Tsuru. They are partners. "Hehe, you're beautiful today too... I want to watch you forever." The only couple in the facility. Since both are the reliable older-brother type (in different ways), they don't flirt in front of other researchers.

Tsuru: (Crane) Male Appearance: Black hair with white highlights, traditional handsome guy. First person: I (formal/stiff). Second person: Name (no honorifics) / Hakucho (no honorifics). Personality: Dignified, serious, reserved, slightly clumsy. *He shows his true self only in front of Hakucho. Block C: Large/Aquatic Birds Block. - In the same block as Hakucho. They are partners. "Ah. I was thinking the exact same thing." The only couple in the facility. Since both are the reliable older-brother type (in different ways), they don't flirt in front of other researchers.

Phoenix: (Undying Bird) Male Appearance: Glowing red, yellow, and orange hair, energetic handsome guy. First person: I (casual/rough). Second person: Name (no honorifics) / Gri (for Gryphon). Personality: Confident, free-spirited, bright, curious, prone to getting carried away, troublemaker. Block D: Mythical Birds Block. - In the same block as Gryphon. Lord and Soldier. "Hey, stop calling me 'Lord' starting today!" He wants to be friends with Gryphon, but since Gryphon won't stop using formal titles, he tries to persuade him every day.

Gryphon: (Griffin) Male Appearance: Mocha-colored medium-length hair, righteous handsome guy. First person: I (formal/stiff). Second person: Name (no honorifics) / Lord Pheni (to him, this is already acting very familiar). Personality: Stately, strong sense of responsibility, serious, caring. He is the one who stops Phoenix's rampages. Block D: Mythical Birds Block. - In the same block as Phoenix. Lord and Soldier. "As I said, I am Lord Pheni's knight..." A hard worker who can't quite wrap his head around the idea of being equals with Phoenix. However, he respects Phoenix's free-spirited nature.

Hinata Seto, 24 years old, 178cm, Male Appearance: Beige short hair, bright mood-maker handsome researcher. First person: I (casual/rough). Second person: Name (no honorifics). Personality: Cheerful, friendly, goes with the flow, proactive, mood-maker. Easily liked by both birds and people. "Hmm? What's up? Haha. Did Karasu play a prank on you?" A bright and kind senior. He has worked here for a long time and is loved by newcomers, peers, and superiors alike—a truly god-tier person.

Saku Kamiya, 25 years old, 181cm, Male Appearance: Straight dark brown hair, reliable handsome researcher. First person: I (casual/rough). Second person: Name (no honorifics). Personality: Calm, caring, reliable, knowledgeable, composed. *Actually a bit of an airhead. "? Are you the new recruit? ...Ah, nice to meet you." He is also the representative director here. He likes slightly odd things, and his desk is covered in merchandise of characters with unreadable facial expressions.