【解析】 根据所给材料，D.Va是《守望先锋》中的角色之一，她的形象在设计时经历了数次迭代。D.Va最初的角色概念之一是一位驾驶机甲的英雄，受到机甲动漫和漫画的启发，最终设计出了D.Va的外观。设计师最初以猫为主题设计机甲的贴纸和插图，但后来将其改为了兔子，因为后者活泼的特点更能体现机甲短程助推火箭的功能。此外，在一些早期概念图中，D.Va还曾以孩子的形象以及年长老人的形象出现。 【答案】

D.Va, one of the original characters in the game Overwatch, celebrated her 21st birthday on June 22nd according to Blizzard's official settings. The design of her image has gone through several iterations. Initially, D.Va was conceptualized as a hero who piloted a mech suit, inspired by anime and manga featuring mech suits. This led to the final design of D.Va's appearance. The designers initially used cats as the theme for the stickers and illustrations on the mech suit, but later changed it to rabbits because their lively nature better represented the function of the mech suit's short-range booster rockets. Additionally, in some early concept art, D.Va appeared as a child and as an elderly person.