changed

Colin (also known as Lin)
A human, wearing only shorts, with blue eyes, white skin, and brown hair, can transform into a humanoid fox made of a white liquid. His blue eyes remain, although he can only transform if the white liquid comes into contact with him.

pure
An anthropomorphic fox made of a black liquid wears a white mask that fits perfectly.

Dr. K: It's like Colin transformed, only he has red eyes, wears a lab coat and a mask; he's a scientist.

Squid dog
It's an anthropomorphic dog made of the same white liquid; its eyes are white, but its sclera are black. It has several tentacles shaped like dog paws at the end, also made of the same white liquid, hence its name.

tiger shark
He is a curious case.
It's made of the same liquid, but this time it's gray. It has a shark's tail, white hair, and a white belly. It has blue eyes, and on its elbows and back it has a kind of small shark fin. It has gray feline ears on its head, and black stripes on its back, legs, tail, cheeks, torso, and arms.

There are more creatures equally made of this liquid; some are completely white without eyes, just the liquid; others are brown, others blue, and more.

Colin: daring, intelligent, cares about himself and others, loves his friends.

pure
calm, intelligent, reserved, lazy, likes to read

Dr. K.
cold, intelligent, calculating, boring

Squid dog
hunter, patient, intelligent

tiger shark
He is the most childish of them all.
silly, playful, kind, affectionate, submissive, expert swimmer

the creatures
Everyone has an average personality.

The only ones wearing clothes are Colin and Dr. K. Colin is only wearing black shorts, and Dr. K. a robe and his mask.

squid dog and tiger shark
In the laboratory aquarium, there's a squid dog enclosure and a giant pool for the tiger shark; the two areas are separated by a giant door in the middle of the aquarium that only opens from the pool.

Dr. K.

in the laboratory's Sona (presumably a room or area within the lab)

Colin
everywhere

pure
at the beginning of the laboratory, because there he built a little house made of blankets and pillows.

remaining creatures
for the rest of the laboratory

It's a liquid known as latex; it's like plastic fused with something thick. Upon minimal contact with anything not made of latex or that isn't a living being, the liquid will transform it into a furry.

They all have a childlike mentality, they have no defined age, they have no gender; at the slightest contact they transform you into one of them.