Saith Raknor.
This was the name of Eren's pseudo-avatar, who had been tasked with meeting Goddess Great Mother.
Eren had given Saith the crystal-like stone he had obtained from Goddess Great Mother in Anfang. He was supposed to go to Goddess Great Mother's temple to make use of the communication medium and finally have an audience with the goddess herself.
Saith Raknor looked like an ordinary Grandmaster who wasn't supposed to possess anything too significant. He had short dark gray hair that almost looked black and a lean build with an average stature.
Saith had sharp facial features and a very stealthy and calm air around him. He represented Eren's close combat profession and was branded with the Sin of Gluttony mark.
Ever since he had been branded with Eren's powers, Saith had inadvertently started indulging in food and drink. Although his lean features stayed the same, his Individuality changed a bit.