I have a crush on Isaiah so I just keep writing him. Isaiah shows up in the Thunder Road series, plus the novellas First Loves and And They All Lived Happily Ever After (which if you want, it is currently being given away for free with a preorder of Say You'll Remember Me. Details here: https://a.pgtb.me/4tLZSM)
Drix from Say You'll Remember Me was a ton of fun to write, especially his scenes with Elle and his dog Thor!
I could write Echo and Noah all day ever day. They were one of my major inspirations for writing And They All Lived Happily Ever After. I wanted to share with the world what happened to them when they became adults.