I keep on thinking of Caldwell's coming sibling, I recall his parents telling him they were expecting in a prior chapter. I suppose Caldwell wants to be a good older sibling when that happens, being someone to look up to and keep his cute little sibling safe no matter what. Would it make for an interesting dynamic for his younger sibling to have a tremendous natural magical ability? Probably, the real issue for them will be the age gap, their ages will be so far apart that forming a meaningful connection could be difficult.
Sometimes the big decisions are just that, big, other times they seem smaller and simpler than they actually are.