The 21-year-old, who arrived at Arsenal from Barcelona five years ago, earned a call-up to the Spain national team for Euro2016 after enjoying a breakthrough season with the North London club which saw him included in the Premier League Team of the Year
But despite his heroics, the young right-back remains grounded according got Jonker.
"When we play in Europe and share a plane with the first team after winning our game, Hector's one of the ones who comes to the back of the plane to congratulate the academy players on their victory," Jonker told Arsenal Player.
"There you can see his commitment to the academy. He has not forgotten where he comes from and that is a different story.
"Foreign players can only come in after their 16th birthday, and Hector has been here since he was 16."