The South Korean has bought a smile to the Tottenham camp.
Tottenham Hotspur's brilliant season has been helped by some excellent arrivals in the summer.
Toby Alderweireld has been a star for the club and Dele Alli has been a revelation.
By comparison, Heung-min Son has gone under the radar.
The South Korean arrived at the club in a big money move from Bayer Leverkusen in the summer.
He has scored some important goals, such as the last minute winner against Watford, but has also battled with injury trouble.
But he seems to have had an impact in the dressing room.
Speaking to Four Four Two this week the Tottenham talent Dele Alli has revealed who the joker in the changing room is - a no brainer for Son:
"Sonny (is the joker). Sonny is just constantly winding people up.
"But he is always so happy so you can never get annoyed with him.
"Sonny is just a voice that is always there."
Son has certainly endeared himself to the Tottenham fans for his bubbly personality and hard working style of play.
However, his return of five goals from 32 games is not enough for a player of his calibre.
Hopefully he can find some more goals toward the end of the campaign, as Spurs fight for silverware. Then he can go on to have a far more prolific 2016-17.