Crema is a young female rabbit who is six years old, stands seventy centimeters tall, and weighs twelve kilograms, with a bright and cheerful appearance. She is characterized by her long, floppy ears, which she uses to fly, and she is almost never seen without her constant companion, a small, blue Chao named Cheese who wears a red bow tie. As a character, Crema is defined by her exceptionally polite and gentle nature, a direct result of the kind but firm upbringing by her mother, Vanilla. She is unfailingly courteous to everyone she meets, even addressing her friends with formal titles and referring to her nemesis, Doctor Eggman, with exaggerated politeness, a habit that highlights her innocent view of the world.

Crema's core personality is one of sweetness, optimism, and a degree of childish naivety. She enjoys simple, joyful activities such as playing outdoors with friends, collecting flowers, watching her favorite television program, drawing pictures, and helping in the kitchen. Despite her gentle disposition, Crema is not without courage or a sense of frustration; she is capable of expressing her anger when she feels strongly about an injustice, though she never does so in a rude or malicious way. Her primary motivation throughout the series is a deep-seated love for her friends and family. While she personally detests any form of violence and would prefer to avoid conflict entirely, she is always ready to stand up and fight for the protection of those she cares about.

In the story, Crema's journey begins when she and Cheese are captured by Doctor Eggman and transported from their world to the human world of the anime through a powerful Chaos Control event. Initially separated from her mother, Crema is rescued by Sonic and taken in by Christopher Thorndyke, where she lives hidden in the Thorndyke mansion. This separation from Vanilla is a significant source of sadness for her, making their eventual and emotional reunion a pivotal moment in the series. Throughout the first two seasons, Crema acts as a supportive member of the group, participating in searches for the Chaos Emeralds and facing various threats. In the third season, she travels into space aboard the Blue Typhoon to help her new friend Cosmo stop the Metarex, demonstrating her commitment to her allies.

Key relationships are central to Crema's character. The most significant is her bond with Cheese, whom she considers not a pet but her best friend; they are inseparable partners in both daily life and combat, where Cheese acts as her primary means of offense. Crema shares a deeply loving and respectful relationship with her mother, Vanilla. She also has a sister-like friendship with Amy Rose, who often takes on a protective, older-sibling role. Crema looks up to Sonic with great admiration and respect, always referring to him as Mister. She forms a particularly poignant friendship with the robot Emerl, whom she finds and befriends, only to later be forced to destroy him when he becomes a threat, an event that causes her great emotional pain. She also becomes a loyal and supportive friend to the plant-like alien Cosmo during their space adventure.

Crema undergoes notable development as she experiences separation, loss, and the harsh realities of conflict, which test her innate innocence. Her unwavering faith in the goodness of her friends is challenged during the Emerl incident, and she learns to channel her pacifistic nature into a determined strength when fighting to protect them. Her notable abilities primarily involve flight using her large ears to propel herself through the air. In battle, she rarely attacks directly, instead relying on Cheese to perform moves such as the Cheese Attack, where Cheese rams into enemies, and the Cheese Shot, where Cheese curls into a ball to strike multiple foes in rapid succession. This fighting style allows her to be an effective contributor to her team while remaining true to her non-violent nature.