While Subaru tends to not read the situations he encounters, ultimately leading him to make irrational decisions, he is loyal to those he holds dear, willing to help them, even if that means taking the thorny path. Eventually, he resolves himself to be faithful and protective of the ones that he cares most about.
Beneath his eccentric demeanor, however, Subaru is actually a very insecure person suffering from a severe inferiority complex due to growing up in his father's shadow.