Okay so Akaashi head cannon:
I feel that Akaashi isn’t as calm as he is made out to be. Like he has those crazy moments as well. However, I believe he only shows that side around Bokuto because he trusts him to know that side of him.
Example: (Based on me and my crazy upperclassman friend)
(Akaashi) Me: Dude, they have free drinks-
(Bokuto) Him: Let’s go!! Hurry!
Me: *Grabs wallet (because they may not be free) and sprints to the road. Across is the free drink truck*
Him: Wait wait! *checks both ways* OKAY GO!!!
Me: Ahhh!! Free drinks!
Him: YEAH FREE DRINKS!!!
Both of us run across the 4 lane highway yelling and smiling.