Eli also appears whenever Elian does, but his name isn't mentioned. Spoiler: Also, in later volumes Ezart, Elian, Eli (still not mentioned by name), Kyle, and Sun Emperor appear in volume 4. There are other unnamed, un-described characters who appear with them, but it's implied they're all people who know Dark Sun well. Ezart is the most recurring, though his appearances still aren't that common because he's always wandering off having his own adventures.