Unlike most who eagerly greeted and hugged the giant, furry Easter bunny visiting Belmont Center on March 28, Otis looked a bit wary. However, the docile pup sat obediently in the white rabbit’s arms and posed for a photo while wearing his own bunny ears. Vicki Frassica, owner of A Chocolate Dream on Leonard Street, said she and the Belmont Center Business Association have been organizing the holiday event for the past four years. This year it was sponsored by…