Saiki doesn't listen to music, or atleast not often. It just adds to the muddle of sounds he hears.

Unsurprisingly, Nendou's favorite food is ramen. It's also his comfort food.

Teruhashi wasn't always seen as the perfect pretty girl. At first she was just like any other kid, but then she started doing Beauty Pageants and was seen as a adorable kid. Then some time during middle school she changed into the perfect pretty girl and became a popular kid.

As you know Saiki breaks the fourth wall a lot. A few times though he has tried to pass through the fourth wall to get the writer to leave him alone and let him have a peaceful life. It failed every time.

Ah, the classic AroAce Saiki headcannon.

After visiting the art Museum in London, Kaidou started working to get better at drawing.

I remember that somewhere in Saiki K Reawakened he mentions how he repeats a year over and over again (Idk remember when or where), and while I feel like that is something Saiki might do eventually once he considered his group as friends, he doesn't actually do it for a very long time, or even ever.