Beliskas

It's simple: it's a cartoon character, and in animation a lot of things are not real.

In the world of "Colorful Cats" (content by Biscas), Beliscas speaks through the conventions of the genre—it's intended by the creator, and viewers simply accept it as part of the story. Cartoons and comics often feature characters without mouths who speak: their lines are shown in speech bubbles, or a voice actor dubs the character and the image is adjusted to match.

Yes, Beliscas can talk.

Explanation:
Beliscus is a character from the "Colorful Cats" universe (a fandom associated with the content of blogger Beliscus). In videos, clips, and fan materials, he is depicted as a fully-fledged character who interacts with other characters and delivers dialogue.

No mouth

Connection to the Anomaly. Beliskas is closely linked to an object called the "Anomaly" (the egg), through which he can influence events and even infiltrate the bodies of other characters.

In the form of the "white entity": here the image becomes more monumental and mysterious. It is a huge creature with a large body and a medium-sized head. Its arms are long, its claws are black, but it has no legs. Its face has only one eye: it has a dark gray white, a blue iris, and a black pupil. Black stripes may appear all over its body.

A small detail: in the story, Beliskas is an entity that has taken control of Biskus's body. Therefore, in the animations, you can sometimes see his appearance transform: for example, when Beliskas "manifests," Biskus's fur turns white, spots appear, and his eyes turn blue.

Beliskas (aka "White Essence", "White Cat") is a character in the animated series "Colorful Cats".

His abilities
Teleportation and portal creation. Beliskas can open white vortex portals and travel instantly, and can even create multiple portals at once.
Black Hole Creation. He can transform an ordinary portal into a black hole, capable of destroying the body of any character.
Telekinesis and spatial manipulation. Able to levitate objects and creatures, freeze them in space, and manipulate spatial parameters.
Manipulation and psychological influence. Beliskas is a master of manipulation: he influences the decisions and behavior of other characters, driving them into a difficult emotional state, effectively acting as a puppeteer.
High intelligence and strategic thinking. Acts as a calculating antagonist, developing multi-step plans and using other heroes to achieve his goals.
Absolute immortality and omnipresence (presumably). The show's lore suggests that Beliskas is virtually invulnerable and can exist in multiple locations simultaneously through portals.
Immense physical strength. In his white entity form, he surpasses many other characters in strength—for example, he can rip an opponent apart.

His personality changes dramatically and he becomes one of the main antagonists:

A calculating manipulator, Beliskas skillfully manipulates other characters to achieve his own ends. For example, he manipulated Priskas and brainwashed him into moral collapse.
Selfish and ruthless, he's willing to do anything to regain his physical form, even to engineer an accident that would kill his former self. His kind heart has essentially frozen over.
A highly intelligent strategist, he devises complex, multi-move plans and exploits the weaknesses of other characters.
Cold and detached, he's indifferent to the suffering of others, seemingly "toying" with their fates for fun, displaying sadistic tendencies.