Xist Elwes (ジスト・エルウェス) is a fictional character from the Mobile Suit Gundam SEED Frame Astrays manga.
A half coordinator and half natural from Fujiyama Company, a company that assist the Earth Alliance, he is send to help out Serpent Tail. He pilots a red ZGMF-515 CGUE and its variant ZGMF-515AS CGUE Assault. He is nicknamed "Chaotic Child" because of his mixed blood, and also because when he uses the CGUE Assault he turns into a robotic-like killing machine and attacks both allies and foes indiscriminately. Xist is aware of this change in his character and dislikes it; he seals away the CGUE Assault so as to control his darker self. He is good friends with Lukas O'Donnell.