If it looks like a cat, walks like a cat, and meows like a cat….it could feasibly be anything .
Kitty and Mimmy White
Who: Kitty (red bow) is the main character of the Hello Kitty franchise, and Mimmy (yellow bow) is her identical twin sister.
Are They Cats?: Kitty and Mimmy are 'gijinka', according to Sanrio. Essentially, they're anthropomorphic cats, as opposed to animals. Think Goofy, but much, much cuter.
Sanrio / Via hellokittydollhouse.tumblr.com
Dear Daniel
Who: Daniel is Kitty's childhood friend and love interest, which makes him the Ken doll of the Hello Kitty franchise.
Is He a Cat?: Daniel is probably also an anthropomorphic cat. It'd be pretty strange if he wasn't, after all of the hullabaloo about Kitty.
Sanrio / Via sanrio.co.jp
Charmmy Kitty
Who: Charmmy is a relatively recently created Persian cat who was given to Kitty as a pet.
Is She a Cat?: Charmmy is a regular, non-anthropomorphic cat. See: Furry Confusion
Sanrio / Via sanrio.co.jp
Ichigoman, Dark Grapeman, and Honey Momo
Who: Ichigoman is Kitty's superhero alter-ego, and Dark Grapeman and Honey Momo are her(?) sidekicks.
Are They Cats?: All three characters are anthropomorphic. They're also superheroes. I don't know if that changes anything fundamental about them or not.
Sanrio / Via sanrio.co.jp