Okay, so i'm very tired, and IDK if other people pointed this out or not, but whatever. Anyway.
Odyssey, it's in the same universe as K/DA. This is evident by Kayn enjoying K/DA Ahri's music.
K/DA and Pentakill are the same universe, evident by Evelynn taking inspiration from Karthus, and being confirmed by RIOT.
And we all know DJ Sona and Pentakill Sona are the same. Therefore, Odyssey Sona, Pentakill Sona, and DJ Sona, are all the same.
Not sure how this works, if there are multiple Sona's in one universe, or if Odyssey is from the future or whatnot.