Sinis and Dex

Sinis and Dex are a pair of twin Mecha-Ude lifeforms who share a bond with Aki. The composed and logical Sinis takes the form of her left arm, while the bold and hot-headed Dex becomes her right. Though their personalities stand in stark contrast, the two complement each other seamlessly. As members of ARMS, they have grown alongside Aki since childhood, pledging absolute loyalty to her. In battle, their coordination is flawless, and they frequently serve as the voice of reason that guides and supports Aki.