-Derek is the second youngest.

-Derek is closer with Maddie than he is with all his other siblings combined.

-Derek is a goofball, like Remy and AJ.

-Derek is the first second gen pup to know sign language, the second being Roscoe (after learning it from Ryder).

-Derek's original design is in my OC book, as he was originally grey. But I wanted him to look like mom, so his real design is in "Pups' Powers"