A 19-year-old man dealing with recent trauma from an unspecified incident. He comes to the tower for personal reasons, but after he's trapped, he becomes engaged in solving the mysteries around him and helping the others escape.
- Art Evolution: His new sprite in the updated trailer shows him with more details and he looks more unique among the cast.
- Childhood Friends: According to Shiroya's bio (and some leaked dialogue on one of the Kickstarter videos), Atsuki has known Shiroya for fifteen years.
- Curtains Match the Window: He has brown hair and brown eyes.
Atsuki's childhood friend who is also dealing with trauma. She comes to the tower to help her and Atuski heal, but their relationship is challenged by the situation they're in.
- Childhood Friends: According to Shiroya's bio (and some leaked dialogue on one of the Kickstarter videos), Atsuki has known Shiroya for fifteen years.
- Technicolor Eyes: She has purple eyes, which is odd considering everyone else has normal-colored eyes.
A sharp-witted man with a sharp tongue to match. Sai is willing to throw everyone off-course just to confirm his thoughts.
- Deadpan Snarker: He has by far the sharpest tongue among the trapped people, and frequently sarcastically comments on the stupidity of his fellow prisoners.
- Long-Haired Pretty Boy: He has his hair in a short ponytail, and he looks quite handsome.
A 9-year-old girl with a lively and cheerful personality. Despite being in an emergency with inexplicable events, she is the calmest out of everyone.
- Animal-Eared Headband: Her earmuffs have ears that are shaped like bears.
- The Baby of the Bunch: She's the youngest person trapped in the tower.
- Cheerful Child: She is in remarkably high spirits throughout the game, considering they are trapped in a tower. She remains cheerful even after the first bodies start turning up.
- Harmful to Minors: In the trailer, she looks terrified while looking at her mother, who has blood on her face.
- Troubling Unchildlike Behaviour: Isla acts excitable and bubbly despite being in a situation that could harm her. Even her mother is unsettled by her behavior.
Isla's mom. She was originally excited to bring Isla to the exhibit but regrets her decision once they’re locked in. She's unable to explain her daughter's actions.
- Mama Bear: She's more concerned for her child's safety than her own. In the second revealed CG
◊, she can be seen holding Isla close to her after she wakes up. - Strong Family Resemblance: She shares Isla's brown hair and teal eyes.
A man with an inconsistent mood. Although he had no interest in the event, he was the first one in the building...
- Mood-Swinger: According to his bio, Akaro could be carefree one minute, then serious the next.
- Older Than They Look: He looks to be older and taller than Erina, but he's 29 years old while Erina's 36.
- Sdrawkcab Alias: His false name, Esata, is his real name, Atase, written backwards (if spelled in the Latin alphabet).
A childhood friend of Atuski and Shiroya, who died several weeks before the events of the visual novel.
- Childhood Friends: With Atsuki and Shiroya.
- Posthumous Character: At the beginning of the game, Atsuki and Shiroya are still in mourning after her recent death in an accident.
