Full art:

Incubation:

“Looks like salmon roe”

Young form #1:

“Cats are liquid”

Young form #2:

Top-left: “Elizabeth collar cat”
Bottom-left: “Grows legs”
Right: “Can’t tell if its a tongue, a mouth, or a jaw, but it has one”

Young form #3:

Left: “Grows whiskers that later turn into hands”
Top: “The legs temporarily look like wings”
Right: “The collar part of the adult form temporarily looks like its body, very flimsy”

Adult form:

Top: “Adult form, where only the main body has a head dome”
Left: “Treats the young forms as toys”
Top-right: “One theory it’s that it’s a cat-alien. The dome is similar to that of a space suit”
Middle-right: “Brimming with curiosity. Occasionally can be ruthless”
Bottom-right: Japanese pun on how writing “neko” in katakana can be stretched to look like “kami” (god) “ﾈｺ ﾈﾛ　神”

Adult form without the dome on its head:

Bottom-right: *Surprised cat sounds*

Balloon:

Bottom: “Silhouette similar to a balloon”
Top: *Chiriin* (Could be a sound similar to a wind chime)

Help me:

Source.