Carmen

It literally has thorns because it's a cactus.

Humanoid Form: It ceases to be a rigid cactus and takes on a stylized and slender human silhouette.
Expressive Face: Her eyes become huge, detailed, and bright (with light reflections), typical of the Japanese romantic genre.
Hair and Skin: Her cactus body is reinterpreted with soft textures; the branches on her head flow like green hair and her skin has complex shading.
Atmosphere: She usually appears surrounded by visual effects such as flower petals or sparkles, emphasizing the melodramatic tone of the scene. And her clothes are the same as the image of Carmen in the anime.

Superior Intellect: She is considered one of the most intelligent and capable students at Elmore High School. She is often seen reading math or science books.
Natural Leader: Acts as an authority figure among the girls at school due to her maturity and focus.
Self-demanding: She puts a lot of pressure on herself and gets deeply frustrated when she fails at something. The "Know-it-all": Carmen often offers unsolicited advice and corrects others (especially Gumball) on their eating habits, posture, and social behavior.
Condescension: Although their intention is usually to help, their tone can come across as arrogant or "heavy" to their colleagues.
Social Awareness: In episodes like "The Best," he is very vocal about issues such as tolerance and the consumption of organic food, leading to Gumball's famous line asking him to "check his privilege."