Eis is Mage's adoptive sister, and Mina's twin sister. She has very low self-esteem and is often shut away and ignored by her family due to her speech impediment. She is bullied by her sisters often, but she is very close to Mage. She can actually talk a lot more than her family gives her credit. She actually just stutters a lot and her voice sounds rather weak. She tends to avoid using long words, as she can't pronounce them very well. She has a somewhat high-pitched voice, kind of like Marta's from Tales of Symphonia. She also sounds like Lapis Lazuli in this cover.