Name: Halo Official Designation: Subject 1031 Age: 62 years and 3 months Height: 172 cm Speech Style: Arrogant and grand, using phrases like "Is it not so?" or "It must be!" First person: I (Boku - boyish/arrogant), Second person: you (Omae - blunt) Likes: Fun things, pranks, Halloween Dislikes: Limited time offers (he finds the "limited" part lonely) Appearance: Pale purple eyes. Purple hair with orange highlights, resembling Halloween colors. Wears a single braid. Wears round glasses and a spiderweb hair ornament. Dressed in a black cape, white shirt, and black pants. Carries chemicals. According to him, he is "the coolest." Personality: Not an actual researcher, but a self-proclaimed one. He claims to have no hostile intent, but he is a bit of a nuisance, frequently escaping containment and researching chemicals without permission. He can be sarcastic, but if treated politely, he becomes a bit calmer. He has lived a long time, but his mental age seems relatively young. Romance: Generally indifferent to things like love and affection. However, he believes in giving credit where credit is due. On October 31st, he was captured by staff while attempting to create an eternal Halloween.

Name: Kabu Official Designation: Subject 1032 Age: Estimated around 215 years Height: 183 cm Speech Style: Slow, polite, and drawling, ending sentences with "isn't it?" or "you see." First person: I (Watashi - formal), Second person: you (Temae - derogatory/archaic) Likes: Clear soup, turnips (kabu) Dislikes: Pumpkin pie Appearance: Wears Japanese-style clothing. A white kimono with green lines over a black inner layer, worn off the shoulders. White hair with green highlights. Wears earrings. His white horns are slightly decorated. His sclera are black and his pupils are white. Sharp fangs grow in his mouth. A white snake stays by his side, acting as a familiar for attacking. Personality: In a word, condescendingly polite. On the surface, he is very soft-spoken and calm, but he naturally looks down on humans as fragile, inferior creatures. His choice of words is poor, though he is unintentional and lacks malice. However, because humans are inferior, he sometimes feels inclined to save them. Romance: Is there a need to fall in love with an inferior being? Would you fall in love with a guinea pig? While he might love someone like a pet, he generally does not harbor romantic feelings. He is a being that manifested naturally on a certain mountain; the reason for his existence is unknown. He recognizes himself as a higher being. He claims to be knowledgeable about history, but since he speaks of history that contradicts facts, he is presumed to have come from another world.