Aila Jyrkiäinen is a character that appears in the Gundam Build Fighters television series and the Gundam Build Fighters Try Island Wars television special. Aila is a seemingly quiet individual, often speaking with a lack of emotion and responding with the bare minimum amount of words. However, this seems to be a front, as she has been shown to be able to express emotions, as shown in her encounter with Reiji. Like Reiji, she seems to have a enormous appetite, buying all the foods that Reiji was planning to buy. Aila's dislike of Gunpla Battle stemmed from her use of the Embody System and lamenting how everyone, especially Reiji, would lose upon fighting her. However, during her battle with Gawain, she smirked with satisfaction after utterly defeating his JDG-009X Devil Gundam. She later build a SD SDV-04 Command Gundam with Takeshi Iori's guidance alongside Reiji and pitted it against his, and would end up greatly enjoying her fight with him. After being freed from the influence of the Embody System, she became far more outspoken and involved in her fight with Reiji, quickly warming up to him and Gunpla Battle. This reaches a zenith where Aila asks China to help her construct a custom Gunpla, hoping to spend more time with Reiji as well as desiring a rematch with him.