I don't know how to break it to you guys but... yeah, Helene lied*. "Two out of the 3 are ghosts, so that counts, right?"
If it wasn't obvious enough when Helene found the letter with the crook and flail seal back in Chapter 10, I also went into detail about how a pair of Osiris brand sneakers inspired the comic in the DECADE anniversary PDF (which can be yours for only $2 USD!).
*Wait, you're saying I lied? No, no, it wasn't me, it was that scoundrel Helene! I never lie!