Yamato x Carrot (YamaRrot). Since I'm still bitter about what happens to them in canon, I'm giving them some love here.
Yamato and Carrot would be that adorably adventurous couple who are too restless to not have fun.
Yamato would give Carrot a lot of heart-shaped carrots because she has a big appetite (and I learned that rabbits should NOT eat chocolate), while Carrot would only give Yamato either a small amount of chocolate or something healthier (because Yamato would be a fitness buff/health conscious).
Plus, they both have long appendages on their heads (Yamato's horns and Carrot's ears)!
Happy Valentine's Day (featuring a rabbit girl for the Year of the Rabbit)!