A Golden Companion
A golden companion is someone who will never leave you, no matter how many times you insult them, call them names, or throw stuff at them. They’re like your brother, but with better fashion sense.
You insult them for an hour. They just laugh and say, 'You’re still my favorite disaster.'
They wear your old clothes to school and make you look like a fool.
They show up at your birthday party in a full-on costume just to make you laugh.