Snowball (しろねこさん Shironeko-san) is a Regular Cat in Neko Atsume, and the first in the Catbook. It is the cat that shows up during the tutorial of the game. One of its favourite goodies is the red rubber ball.
Snowball can be seen as a counterpart to Ham Ham from Hit-Point's game Spoon Pet Collector, since both are the first pets that appear in the game, during the tutorial stage. Both are also listed first in their respective books.