system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: The suffixes after names in Japanese (e.g. -chan, -kun, -san)
gpt
-chan is for when you call someone cute, or younger people.

-kun is for friends, your buddies.

-san is for adults and general people you want to adress politely

It's only used when addressing someone directly, not for yourself. It's basically just a way of indicating your relation to the person.