It's the tiger shifter here
https://www.mangago.me/read-manga/lying_puppies_get_eaten/uu/br_chapter-363323/pg-1/
Go to page 42, you'll see him clearly
He's the blonde tiger from the other school who helped break up the fight and was part of the disciplinary committee. Chapter 62-62 he meets at the cafe to tell the fox he liked Rio and wanted to pursue him and then got Rio's number.
OHHH RIIIGHT
Guys who the hell is Yaw i genuinely don't remember