Female Sprout. Wears an orange apron and has hair made of leaves. She is the tallest and is (probably) good at making cupcakes. One side of her hair is decorated with caramel and honey syrup, and one eye is covered by honey syrup. Wears an orange and white patterned muffler. Likely doesn't talk much about butts.

Male Astro, NaCl. Wears a light blue blanket and a sleeping cap. Moon-shaped hair. The tip of his sleeping cap has a purple gradient. The cap is decorated with a keychain clip and a mint-colored pin. Gets his butt smacked by the Shellys... Has the ability to create magic circles that restore stamina. Has a second set of hands, which are magic circle hands.

Male Astro. Wears a yellow sleeping cap and blanket. Has a square-shaped head and square black headphones. He does... talk about butts occasionally. Moon-shaped hair, and the tip of his sleeping cap has a star ornament instead of a pom-pom. Uses yellow magic circles.

Female Shelly. A bit... chic? But very mischievous. Goes around smacking the butts of Astros, Pebbles, and Sprouts. She is dark blue. Wears a light blue dinosaur hoodie. Smacks butts hard. Has the ability to increase extraction speed (the Shellys say she smacks butts when increasing extraction).

Female Pebble. A pebble with a completely white body. Extremely cute and adorable with a '3' shaped mouth. A white pillow is secured to her body with pink strings. She is... kind. Has a heart decoration on one cheek and the pillow. Has a hidden mouth in her tail and a very fluffy tail! Has the ability to make loud noises.

Presumed female. A pebble with a completely black body. Has four-petaled white flower patterns on both cheeks. Her voice is extremely neutral. Has three eyes—two on one side and one on the other. Has the ability to make loud noises.

Female Shelly. A green ammonite. Wears a yellow raincoat, and green triangular ears float above her head. Just cute, I'm telling you she's just cuuuuute (everyone in TMOA Apartment is cute). Also has the ability to increase machine extraction. Goes around smacking butts... She and Inu seem to be a 'Butt Hunter' duo.

Presumed male. A Cosmo. Wears a purple scarf and has purple cream for hair. He's quite quiet, so his presence is a bit... no, no, never mind. Wears a white tracksuit. Has three purple star-shaped sprinkle decorations on each cheek. Gets his butt smacked like crazy... Good at making cookies.