Pix is a digital entity, more specifically a virus, and as such doesnt really have a physical form, however, cat pictures seemed pretty popular on the internet, so making his base appearance inspired by felines seemed beneficial to getting access to a wider spread.

Usually id add a lot more distorted visuals for this but this is also supposed to be kind of a ref sheet for pix, although his shapeshifting nature means theres no wrong way to draw him, he does like the color orange the most though!