sunbae

noun2

1. •
   An upperclassman or senior, in the context of Korea.

   • When students start their freshmen year in college, they are taken care of by their sunbaes, who give them various advice about school. — 2012
2. •
   An older or more experienced idol, viewed as a veteran, mentor, or predecessor.

   • Winner and iKon learned and grew by following their sunbaes' (seniors) footsteps. — 2019