Twixxel, Grox, Whispy, Thatmob.

Twixxel has tousled dark hair with a contrasting blonde streak, and small, pointed "horns" on top of her head. Her face is almost completely hidden in shadow, revealing only empty, pupil-less white eyes, which lends an unsettling quality to her appearance.
The clothes are deliberately casual and voluminous: a loose black sweater (or hoodie)
minimalist pixel print of a smile on the chest;
the sleeves are decorated with wide grey-black stripes;
around the neck is a massive striped scarf, which turns into a long, fluttering tail with a hooked end;
short dark shorts with a small
with a patch on the side;
voluminous "baggy" boots with a muted light sole.

The main detail about Whispy isn't his character or personality, but his appearance. Instead of a head, he has a pumpkin with cutouts for his eyes and yellow mouth (he can easily move his mouth and eyes, closing and opening them, etc.).
and also, from this pumpkin "growing" a small... uh, blade of grass (???), which looks like curly hair, although it's only one thing. (Whispy is like... bald? 1:>) well, let's move on to Whispy's clothes :: Whispy ALMOST always wears an acid (???) pink sweatshirt, which is why
what's underneath (that is, a T-shirt or something else) is almost invisible.
and also, he wears slightly tight (????? 1?1?) dark blue jeans. (and his shoes are Adidas sneakers)

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Mob is quite serious and reserved, quiet, and can sometimes be rude and speak rarely. He's more outgoing with friends, but still prefers to remain silent when we're worried about safety. He's attentive, though not always so, and can be persistent. He wears a black hoodie, a black mask with red trim, and dark hair. He wears black pants.

Grox is calm, usually likes to blow things up and play pranks on his friends. He has a gun. He has black hair and gray skin. His entire face except his mouth is covered by a gray skull mask. His eyes are black with white pupils. He wears a black jacket and a white shirt underneath, a small fur coat draped over his shoulders, black pants, and a smirk. He wears black men's shoes and a red tie.