You might have seen Korean speakers adding -아, -야, or -이 after someone’s name when they are speaking casually. Hyunwoo explains why.
Also check out these lessons
One-Stop Guide to Korean Particles – 은/는/이/가 (Subject & Topic Markers) https://youtu.be/fCxLNRLntc0
How Korean Names Work https://youtu.be/Wp6v1OSCdJ8
Mentioning a Korean name followed by -아, -야, -이