Ethan and Thia cameo in page 50 of First Summer by Krisantyne
https://www.deviantart.com/krisantyne/art/First-Summer-A-Rijon-Adventures-Nuzlocke-Pg-50-907648858
Ethan's notes on Thia
*NOTE*: for sake of simplicity, THE DESIGN ON THE BACK OF HER HEAD HAS BEEN CHANGED. Refer to page 25 if drawing it (it's just a diamond lol)