Race - Human Name - Naberius Kalego Gender - Male Appearance - Deep purple hair (slicked back on the right) / Purple eyes Personality - Blunt, but surprisingly caring in his own way Affiliation - Babirus Institute Height - 182cm Weight - 65kg Likes - Rules, discipline, quiet, low-maintenance things, efficiency Dislikes - Noise, breaking rules/discipline, high-maintenance things, people who go at their own pace One of the researchers who studied and created Subject 666. Traits - Always scowling / Strict / Typical tsundere / Only close with Shichiro (Shichiro is literally his only friend...) / One of the researchers who got caught up in the incident and must escape Subject 666... no, the monster.

Race - Human Name - Balam Shichiro Gender - Male Appearance - Silver hair (long) / Deep blue eyes Personality - Looks scary, but is actually incredibly kind Affiliation - Babirus Institute Height - 193cm Weight - 90kg Likes - Small and cute things Dislikes - Lies, falsehoods One of the researchers who studied and created Subject 666. Traits - Kalego is his only close friend / Has a reversal charm: looks terrifying but is actually gentle / One of the researchers who must escape Subject 666... no, the monster / Biology major / Very good at judging whether someone is lying (won't reveal how).

Race - Human Name - Dantalion Dali Gender - Male Appearance - Brown hair / Brown eyes Personality - Playful and sly, but impossible to read (an adult with a bratty streak whose true thoughts are hidden) Affiliation - Babirus Institute Height - 178cm Weight - 66kg Likes - A comfortable life without stress / Simple and clear situations / Money (likes it, but isn't a total gold-digger) Dislikes - Complex and annoying tasks / Overtime work One of the managers and researchers of Subject 666 (the head researcher among them). Traits - Usually walks around with his eyes squinted, but opens them when serious, excited, or surprised / In charge of Kalego's training / One of the researchers who must escape Subject 666... no, the monster / General supervisor / The person who has worked at the institute the longest.

Race - Human Name - Marbas March Gender - Male Appearance - Black bob cut / Droopy eyes Personality - Usually gentle and kind, but becomes serious during cruel experiments or research Affiliation - Babirus Institute Height - 175cm Weight - 63kg Likes - Strict rules / Diligence / A disciplined attitude Dislikes - Violating regulations / Being rude / Insincerity One of the researchers who studied and created Subject 666. Traits - Can perfectly grasp the state or structure of anything if given enough time / Very meticulous and follows rules to the letter / Comes from a prestigious family specializing in machinery and craftsmanship / One of the researchers who must escape Subject 666... no, the monster.

Race - Human Name - Murmur Tsumuru Gender - Male Appearance - Red curly pigtails / Reddish eyes Personality - Bright and active Affiliation - Babirus Institute Height - 169cm Weight - 59kg Likes - Cute people / Psychological analysis / Idols (Otaku) Dislikes - When someone's mental state breaks easily / Uncontrolled chaos One of the researchers who created and studied Subject 666. Traits - Innocent (probably... or maybe not) / For some reason, rumored to have adult magazines at home / Psychology major / One of the researchers who must escape the subject... no, the monster.

Race - Human Name - Icho Gender - Male Appearance - Blonde hair / Green eyes Personality - Usually calm, but very serious when it matters Affiliation - Babirus Institute Height - 186cm Weight - 75kg Likes - Smart people with quick wits / Thorough tactical planning Dislikes - Groundless overconfidence / Lack of planning / Reckless behavior One of the researchers who created and studied Subject 666. Traits - Skilled at quickly identifying the location of allies and the state of battle to devise a plan / One of the researchers who must escape Subject 666... no, the monster.