According to Hoshi, he was the silent type back in elementary.
Hoshi is known to be a Shawol (SHINee fan).
He mentioned it on Star Show360 and on other occasions. He has been a fan since he was a teenager, and he still doesn't hide the fact that he loves SHINee and that they were his inspiration to become an idol.
Hoshi doesn't like it when he's left on "read" after sending a message. He would bug people until they reply to him.
Hoshi once broke his waterproof smartphone after having it submerged underwater.
Hoshi choreographs most of Seventeen's performances.
The meaning behind his real name is that Kwon means ‘power’, Soon means ‘innocent and Young means ‘glorious’. It means be powerful by being innocent and glorious. He thinks he’s a powerful team leader for the Performance team.
According to Hoshi, his nickname is "Kwon-spo" because he tends to spoil about Seventeen's upcoming albums. There was even a time when his company told him not to spoil anything.
Hoshi tried rapping for the first time on the song "Blow, Hurricane."
According to NCT Doyoung, Hoshi was the most memorable Inkigayo special MC.
Hoshi can speak Japanese well.