Spoilers
I think Konpeito missed an opportunity to include a recreation of the high school graduation group photo Baxter is in with Marcus, Callum, Troy, Karina, and Ronny, drawn in the new WIFL style.
I think Marcus' haircut is out of regulations. It looks like he has more than the 2 inches of hair bulk on top of the head allowed for men by the current at the time of writing US Army grooming standards.
Also, I know it's wishful thinking, but perhaps Mylo could have asked Jakob if he wanted to be friends when Mylo met up with him to return the spare key.