Guinea pigs are loving and they love companionship and being able to run around freely and enjoy playing and hiding.
They are very fast moving animals. Guinea pigs are much easier to look after than rabbits and do very well in pairs or in a large group of the same sex.
NEVER KEEP A GUINEA PIG WITH A RABBIT
This is not fair on the rabbit or the Guinea pig. There are many reasons for this, here are just a few;
1) They don't eat the same food
2) They don't speak the same langauge
3) Guniea pigs tend to bite rabbits legs and ears and could really harm your bunny, also a rabbit will try to mate with the Guinea pig which could make your Guinea pig very poorly and need vet treatment or even cause your Guniea pig to die through shock and trauma to her insides.