Best boi. he will fight yo ass and win in tetris 99. He won't steal yo girl, but only because he a gentle dudebro. Can't live without a Jelmer. Any time spend with a Jelmer is good time!
"I was hanging with Jelmer yesterday"
"Ow dude, that's so cool. Jelmer is like the nicest guy"
a man seeing that someone he knows might be getting it on with a nice looking lady, waits for him to head to the toilet or the bar and then swoops in to take that lady for his own.