Other nicknames: easter bunny, "pink usagi", "brown usagi", "white usagi (cute)".
When I first found this one, I thought it might be a pig. After a while, though, I discovered a more complete collection on an archived page of anikaos.com that identified it as a rabbit.
When animation is disabled, gifs will only play if you click on them.
Pink
Positive
Happy, laughing, excited, in love, etc.
Negative
Upset, scared, confused, apologetic, embarrassed, etc.
Neutral
Actions, hello/goodbye, holidays, and weather.
Together With Brown
Brown
Positive
Happy, laughing, excited, in love, etc.
Negative
Upset, scared, confused, apologetic, embarrassed, etc.
Neutral
Actions, hello/goodbye, holidays, and weather.
White
Positive
Happy, laughing, excited, in love, etc.
Negative
Upset, scared, confused, apologetic, embarrassed, etc.
Neutral
Actions, hello/goodbye, holidays, and weather.
White Anikaos Usagi also appears in an animation with Grizzly.
???
This one doesn't seem to be made by the same artist, but the distinctive ear design is very similar.