I don't have the Roll20 module myself but I do have the hardcover book, so I'll see what I can do. The book mentions Eliander on page 9 of the Introduction: "Eliander (LN male human gladiator )," with the word gladiator in bold, meaning he uses the gladiator stat block from either the Monster Manual or the 5th Edition SRD. I did not notice any art for him. Most NPCs in the book, like Eliander, have no art and no unique stat block. Some have art but no unique stat block. (Example: Master Refrum, a priest , in Chapter 8, The Styes, art on page 169.) He might have his own token set up with that art, linked to the priest stat block. A few NPCs have both art and their own stat block (Example: Mr. Dory, in Chapter 8, The Styes, art on page 177, stat block in Appendix C, page 246.) He definitely should have a token. Does Master Refrum and/or Mr. Dory show up for you?