The symbolic circular cat from the mobile game Nyanko Daisensou ('The Battle Cats' in its English version). It is the first cat unit available when starting the game. Its head is similar to the emoticon (^・∀・^).
Use this tag when:
The cat is an entity itself, either with tiny legs, or no legs at all;
or
The cat's head is a design element of an object worn by another type of cat unit; as in armor, weapons, ornaments, etc. (see: cat_valkyrie_(nyanko_daisensou) spear)
Don't tag when another type of cat has the same head as the basic cat, but is a character on its own (e.g.: Sexy Legs Cat).
